CN101478631B

CN101478631B - Imaging system and method of manufacturing the imaging system, and imaging apparatus provided with the imaging system

Info

Publication number: CN101478631B
Application number: CN 200810179823
Authority: CN
Inventors: 佐藤贤一; 米山一也
Original assignee: Fujinon Corp
Current assignee: Fujifilm Corp
Priority date: 2007-12-07
Filing date: 2008-12-05
Publication date: 2013-04-10
Anticipated expiration: 2028-12-05
Also published as: JP2009139697A; CN101478631A

Abstract

The present invention provides an imaging system capable of improving the quality of image data obtained by capturing an optical image projected on a light receiving surface. An imaging system composed of an imaging lens (10) and an imaging element (20) is prepared, and the imaging system also makes the point The maximum diameter of the effective area of the image ( P1 ) is 3 pixels or more related to the light-receiving pixels. The signal processing unit (40) generates a second image equivalent to the first image data output from the imaging element (20) when the resolution of the imaging lens (10) is high, on the first image data output from the imaging element (20). Data recovery processing. The imaging lens has in order from the object side: a first lens group consisting of at least one lens and having a positive refractive power; a second lens group consisting of at least one lens and having a negative refractive power; The third lens group is composed of at least one lens, and the lens on the most image side has a negative refractive power.

Description

Camera system and manufacture method thereof and possess the camera head of this camera system

Technical field

Camera system, the manufacture method of camera system and camera head, portable terminal device, mobile unit and the Medical Devices that possess this camera system of the quality of the view data that the optical image that the present invention relates to utilize the raising such as restoration disposal to take subject obtains.

Background technology

As everyone knows, utilize and to have that two-dimentional shape configures a plurality of light receiving pixels and the imaging apparatus of the CCD element of the sensitive surface that consists of or cmos element etc. is taken the camera system that is imaged on the optical image of the subject on the sensitive surface by imaging lens system.

In addition, as an example of this camera system, known camera system with imaging lens system that the depth of field of being designed to deepens directly is installed on circuit substrate and the vehicle mounted camera that consists of or mobile phone with (with reference to patent documentations 1) such as cameras.This size that is directly installed on the camera system on the circuit substrate is limited, so plant bulk is designed to less.

And also known lift-launch increases the light receiving pixel quantity of imaging apparatus and improves the camera system of resolution of imaging lens system and the high performance vehicle mounted camera or the mobile phone camera that consist of.Be equipped on this high performance vehicle mounted camera that can obtain the high image of resolution or mobile phone with in the camera system of camera, known have the resolution of imaging lens system near the camera system of the performance of diffraction limit.

Patent documentation 1:(Japan) JP 2007-147951 communique

But, the image request that utilizes this camera system to obtain is further improved resolution.

Improve the resolution of the image that is obtained by camera system, improve the resolution of imaging lens system when need increasing the quantity of light receiving pixel.Namely, when for example improving the picture element density of the light receiving pixel on the sensitive surface that is arranged in imaging apparatus, improve imaging lens system resolution so that the point that projects on this sensitive surface by imaging lens system look like to converge in the scope of 1 light receiving pixel, thereby can improve the resolution of utilizing the image that camera system obtains.

Here, along with the in recent years raising of technology, can improve than being easier to realize aggrandizement apparatus size not the picture element density of the light receiving pixel that consists of imaging apparatus.

On the other hand, the resolution of raising imaging lens system is very difficult.That is, for the size that need not increase imaging lens system or the depth of field is shoaled and improve the resolution of this imaging lens system, need to suppress to consist of the form error of each lens of imaging lens system or assembly error etc.But the resolution of this imaging lens system has been brought up near diffraction limit sometimes, exists further raising to make precision (processing, assembling, degree of regulation etc.) and improves very hard problem of resolution.

But, have in the camera system of this imaging lens system that forms the high image of resolution in manufacturing, owing to the difficulty of making is difficult to improve qualification rate.That is, owing to can not generate the view data that can form the image with predetermined resolution, therefore might produce much from manufacturing line and pull down and turn back to and regulate again or the camera system of assembling again.And, with regard to the camera system of pulling down from manufacturing line, by determining its reason and impose correction, thereby obtain regenerating to generate the view data of the image that can form predetermined resolution.

But, have much from the reason of the decrease resolution of the image of the pictorial data representation of camera system output, such as the assembling of the form error (surface shape error of lens, thickness error, eccentric error) of each lens of considering the formation imaging lens system, imaging lens system, regulating error (the airspace errors between the offset error of lens, heeling error, the lens), the imaging apparatus a variety of causes to the position error of imaging lens system etc.Therefore, have following problem, that is, for the reduction reason by determining resolution and regulate or again assembling, regeneration is with the camera system of the high-quality view data that can generate the image that can form predetermined resolution again, and huge expense produces.

Summary of the invention

The present invention makes in view of the above problems, its purpose is, provides and can improve camera system, the manufacture method of camera system and camera head, portable terminal device, mobile unit and the Medical Devices with this camera system of taking the quality that projects to the view data that is subjected to the optical image on the face and obtains.

The camera system of the 1st mode of the present invention is characterized in that, has: imaging lens system; Imaging apparatus has that two-dimentional shape is arranged a plurality of light receiving pixels and the sensitive surface that consists of, takes the 1st view data that the optical image that projects to the subject on the sensitive surface by imaging lens system is exported this subject of expression; And signal processing unit, to the 1st view data implement to generate with when the resolution of imaging lens system is high from the restoration disposal of the 2nd equal view data of the 1st view data of imaging apparatus output; Imaging lens system has successively from the thing side: comprise at least 1 lens and have the 1st set of lenses of positive focal power, comprise at least 1 lens and have the 2nd set of lenses of negative focal power, and comprise at least 1 lens and be positioned at the 3rd set of lenses that the most close lens as side have positive focal power; Imaging lens system and imaging apparatus constitute: for projecting to some picture on the sensitive surface from the optional position of X, Y, Z direction by this imaging lens system, also so that the maximum gauge of the effective coverage of this some picture becomes the above size of 3 pixels that relates to light receiving pixel.

Above-mentioned imaging lens system can constitute: for from projecting to the optical image of the subject on the sensitive surface by this imaging lens system at a distance of the X more than 10 times, the Y of the focal length of this imaging lens system, the optional position of Z direction, also so that the value of the MTF characteristic relevant with this optical image just become.

Above-mentioned signal processing unit can will carry out restoration disposal as least unit by reaching the pixel region that adds up to more than 9 pixels that relates to that consists of more than horizontal 3 pixels more than vertical 3 pixels on the sensitive surface; Restoration disposal is carried out as least unit in the minimum pixel zone that maybe will comprise whole effective coverages of the some picture that projects on the sensitive surface.

Above-mentioned signal processing unit can be carried out restoration disposal, so that the size of effective coverage that represents the some picture in the image shown in the 2nd view data is less than the size of the effective coverage of the some picture in the image of expression shown in the 1st view data.

The above-mentioned signal processing unit utilization recovery coefficient corresponding with the state of the some picture of the 1st pictorial data representation carried out above-mentioned restoration disposal.

Above-mentioned recovery coefficient can be obtained separately this camera system by each camera system; Or the state according to the some picture of the 1st pictorial data representation is selected from the candidate of each recovery coefficient corresponding with each state of the some picture that is divided into a plurality of kinds; Perhaps can be from the candidate of the multiple recovery coefficient corresponding with each state of this some picture that is divided into a plurality of kinds, further to have carried out the recovery coefficient of proofreading and correct according to the state of a picture according to the selected recovery coefficient that goes out of the state of the some picture of the 1st pictorial data representation.

Above-mentioned camera system can also have the recovery coefficient of obtaining recovery coefficient and obtain the unit.

The camera system of the 2nd mode of the present invention is characterized in that, has: imaging lens system; Imaging apparatus has that two-dimentional shape is arranged a plurality of light receiving pixels and the sensitive surface that consists of, takes the 1st view data that the optical image that projects to the subject on the above-mentioned sensitive surface by imaging lens system is exported this subject of expression; The coefficient storage unit, when the maximum gauge in the effective coverage that projects to the some picture on the sensitive surface by above-mentioned imaging lens system relates to big or small more than 3 pixels, to by storing from recovery coefficient corresponding to the state of the some picture of the 1st pictorial data representation of imaging apparatus output; And signal processing unit, utilize the recovery coefficient be stored in the coefficient storage unit to implement from the 1st view data of imaging apparatus output to generate with when the resolution of imaging lens system is high from the restoration disposal of the 2nd equal view data of the 1st view data of imaging apparatus output; Signal processing unit will carry out restoration disposal as least unit by reaching the pixel region that adds up to more than 9 pixels that relates to that consists of more than horizontal 3 pixels more than vertical 3 pixels on the sensitive surface; Imaging lens system has successively from the thing side: comprise at least 1 lens and have the 1st set of lenses of positive focal power, comprise at least 1 lens and have the 2nd set of lenses of negative focal power, and comprise at least 1 lens and be positioned at the 3rd set of lenses that the most close lens as side have positive focal power.

The recovery coefficient that this camera system is obtained separately can be stored by each camera system in above-mentioned coefficient storage unit.

In addition, above-mentioned coefficient storage unit can be stored from the candidate of each recovery coefficient corresponding with each state of the some picture that is divided into a plurality of kinds according to the selected recovery coefficient that goes out of the state of the some picture of the 1st pictorial data representation.

And above-mentioned coefficient storage unit can be stored from the candidate of the multiple recovery coefficient corresponding with each state of this some picture that is divided into a plurality of kinds according to the selected recovery coefficient that goes out of the state of this some picture of the 1st pictorial data representation and further carry out the recovery coefficient of having proofreaied and correct of proofreading and correct according to the state of a picture.

Above-mentioned camera system can be used as to be possessed the recovery coefficient of obtaining recovery coefficient and being stored in the coefficient storage unit and obtains the unit.

Above-mentioned signal processing unit can be carried out restoration disposal as least unit with the minimum pixel zone that comprises whole effective coverages of the some picture that projects on the sensitive surface.

Above-mentioned signal processing unit preferably carries out restoration disposal, so that the size of the effective coverage of the some picture in the image of the 2nd pictorial data representation is less than the size of the effective coverage of the some picture in the image of the 1st pictorial data representation.

In the camera system of above-mentioned the 1st mode and the 2nd mode, being positioned at the most close lens face as side and can having axle outcurve point in above-mentioned the 3rd set of lenses, or can be at the central part of this lens face to being concave surface as side at periphery to being convex surface as side, or satisfy following conditional (1).

0.5H<h<H……(1)

Wherein,

H: the effective radius of the lens face that is positioned at the most close picture side in the 3rd set of lenses,

H: the distance from axle outcurve point to optical axis of the lens face that is positioned at the most close picture side in the 3rd set of lenses.

Here, bent point is the point on the lens face, when the section of this point is vertical with optical axis C (Z axis), this point is called bent point.And, will with lens face on the point of optical axis intersection beyond the song point be called axle outcurve point.

The lens face of the thing side that is positioned at the most close lens as side in above-mentioned the 3rd set of lenses can be convex surface to the thing side at the central part of this lens face, is concave surface at periphery to the thing side.

Above-mentioned imaging lens system can be made of 3 einzel lenses.

The einzel lens of above-mentioned the 1st set of lenses can be with the meniscus shape of convex surface towards the thing side, and the einzel lens of above-mentioned the 2nd set of lenses is with the meniscus shape of convex surface towards the picture side.

Camera head of the present invention is characterised in that to have the camera system of above-mentioned the 1st mode or the 2nd mode.

Portable terminal device of the present invention is characterised in that to have the camera system of above-mentioned the 1st mode or the 2nd mode.

Mobile unit of the present invention is characterised in that to have the camera system of above-mentioned the 1st mode or the 2nd mode.

Medical Devices of the present invention are characterised in that to have the camera system of above-mentioned the 1st mode or the 2nd mode.

The camera system of the 3rd mode of the present invention is characterized in that, has: imaging lens system; Imaging apparatus has that two-dimentional shape is arranged a plurality of light receiving pixels and the sensitive surface that consists of, takes the 1st view data that the optical image that projects to the subject on the sensitive surface by imaging lens system is exported this subject of expression; The coefficient storage unit, when the maximum gauge in the effective coverage that projects to the some picture on the sensitive surface by imaging lens system relates to big or small more than 3 pixels, stored with by from recovery coefficient corresponding to the state of the some picture of the 1st pictorial data representation of imaging apparatus output; And signal processing unit, utilize recovery coefficient to the 1st view data implement to generate with when the resolution of imaging lens system is high from the restoration disposal of the 2nd equal view data of the 1st view data of imaging apparatus output; Signal processing unit will carry out restoration disposal as least unit by reaching the pixel region that adds up to more than 9 pixels that relates to that consists of more than horizontal 3 pixels more than vertical 3 pixels on the sensitive surface; Imaging lens system has successively from the thing side: comprise at least 1 lens and have the 1st set of lenses of positive focal power, comprise at least 1 lens and have the 2nd set of lenses of negative focal power, and comprise at least 1 lens and be positioned at the 3rd set of lenses that the most close lens as side have positive focal power.

The manufacture method of camera system of the present invention, it is characterized in that, in the manufacturing of the camera system of above-mentioned the 3rd mode, to put picture by imaging lens system and project on the sensitive surface of imaging apparatus, in the coefficient storage unit storage with by recovery coefficient corresponding to the state of the some picture of the 1st pictorial data representation of exporting from this imaging apparatus.

Above-mentioned recovery coefficient can be obtained separately this camera system by each camera system.

Above-mentioned recovery coefficient can be that the state according to the some picture of the 1st pictorial data representation is selected from the candidate of each recovery coefficient corresponding with each state of the some picture that is divided into a plurality of kinds.

In addition, above-mentioned recovery coefficient can be further to have carried out the recovery coefficient of proofreading and correct according to the state of a picture according to the selected recovery coefficient that goes out of the state of this some picture of the 1st pictorial data representation from the candidate of the multiple recovery coefficient corresponding with each state of this some picture that is divided into a plurality of kinds.

And above-mentioned recovery coefficient can be obtained separately this camera system by each camera system.

In each mode of the invention described above, the maximum gauge that projects to the effective coverage of the some picture on the above-mentioned sensitive surface can be the diameter that the effective coverage that projects to the some picture on the sensitive surface comprises this effective coverage on the direction of maximum light receiving pixels, above-mentioned " point as the maximum gauge of effective coverage become the structure that relates to the above size of 3 pixels " can be " comprise in the effective coverage of a picture on the direction of maximum light receiving pixels, this effective coverage becomes the structure of the above size of 3 pixels that relate to light receiving pixel ".

Above-mentioned " effective coverage of some picture " means the 1/e of the peak strength in the light distribution with expression point picture ²The zone of the light intensity that (about 13.5%) is above.

In addition, above-mentioned " restoration disposal " can adopt the image restoration processing introduced in No. 2000-123168, the Japanese Patent Publication newspaper, 0002～0016 section etc.And, in the enforcement of restoration disposal, can use that non-patent literature [Eagle swamp described later is good one, good fortune man of virtue and ability work under the mountain, exercise question " KernelWiener Filter ", 2003 Workshop on Information-Based InductionSciences, (IBIS2003), Kyoto, Japan, Nov 11-12,2003] technology etc.

In addition, above-mentioned " at a distance of the position more than 10 times of the focal length of imaging lens system " expression " will consist of the position of optical axis intersection of the face of the most close object side (thing side) in the lens face of imaging lens system and this imaging lens system as the reference position, the optical axis direction from this reference position along this imaging lens system (Z-direction) leaves the position more than 10 times of focal length to object side ".

The camera system of the 1st mode of the present invention, imaging lens system made from the thing side have successively: comprise at least 1 lens and have the 1st set of lenses of positive focal power, comprise at least 1 lens and have the 2nd set of lenses of negative focal power, and comprise at least 1 lens and be positioned at the 3rd set of lenses that the most close lens as side have positive focal power; Imaging lens system and imaging apparatus are constituted: for projecting to some picture on the sensitive surface from the optional position by imaging lens system, also so that the maximum gauge of the effective coverage of this some picture becomes the above size of 3 pixels that relates to light receiving pixel, for implement from the 1st view data of imaging apparatus output to generate with when the resolution of this imaging lens system is high from the such restoration disposal of the 2nd equal view data of the 1st view data of imaging apparatus output, so can easily improve the quality of taking the view data that obtains to projecting to optical image on the sensitive surface.

That is, in the camera system of the 1st mode of the present invention, can utilize the low imaging lens system of resolution, obtain the equal image of image that obtains with the optical image of taking the imaging lens system projection by having the resolution that is higher than this imaging lens system.For example, can relate to for the effective coverage of the some picture by the imaging lens system projection vertical 3 pixels on the sensitive surface and total 9 pixels of horizontal 3 pixels.And, relate to the some picture that adds up to 9 pixels and implement restoration disposal from the 1st view data of imaging apparatus output for taking this, so that generate with the zone that converges on 1 pixel on the sensitive surface in the effective coverage of for example putting picture in the time export from imaging apparatus the 1st view data (, when the resolution of imaging lens system is high from the 1st view data of imaging apparatus output) the 2nd equal view data, therefore, can access the 2nd view data that represents identical image with the high resolution of resolution than the image of the 1st pictorial data representation.

And, in this camera system, also can implement above-mentioned restoration disposal to the optical image that projects on the sensitive surface by imaging lens system from the optional position, so can improve the resolution of the integral image of the 1st pictorial data representation.That is, the resolution of the arbitrary region in the image of the 2nd pictorial data representation also can be higher than the resolution of the image of the 1st pictorial data representation.

Thus, improve the situation of the resolution etc. of imaging lens system with the making precision (processing, assembling, degree of regulation etc.) that as in the past, improved camera system and compare, can more easily improve the quality of view data.

In addition, imaging lens system is constituted, if for from projecting to the optical image of the subject on the sensitive surface by this imaging lens system at a distance of the X more than 10 times, the Y of the focal length of this imaging lens system, the optional position of Z direction, also so that the value of the MTF characteristic relevant with this optical image just becomes, then also can further improve reliably its quality for expression at a distance of the 1st view data of the subject of the position more than 10 times of the focal length of imaging lens system.

In addition, if signal processing unit will carry out above-mentioned restoration disposal as least unit by reaching the pixel region that adds up to more than 9 pixels that relates to that consists of more than horizontal 3 pixels more than vertical 3 pixels on the sensitive surface; Then can implement more reliably restoration disposal.

And, if will comprising the minimum pixel zone of whole effective coverages of the some picture that projects on the sensitive surface, signal processing unit carries out restoration disposal as least unit, then can suppress the increase of the operand of restoration disposal, and can implement efficiently restoration disposal.

In addition, if signal processing unit is carried out restoration disposal, so that the size of effective coverage that represents the some picture in the image shown in the 2nd view data then can improve the quality of view data more reliably less than the size of the effective coverage of the above-mentioned some picture in the image of expression shown in the 1st view data.

Here, if the signal processing unit utilization recovery coefficient corresponding with the state (the following fringe that also is called a picture) of the some picture of the 1st pictorial data representation carried out restoration disposal, then can be by the fringe of above-mentioned some picture having been carried out more accurately proofread and correct the 2nd view data that forms, so can improve more reliably the quality of view data.

And, also " state of some picture " is called " fringe of putting picture ", its reason is, project to some picture on the sensitive surface, and take the some picture that this point looks like the 1st pictorial data representation that obtains by imaging lens system, because of impact of image lens aberration etc., and being subject, its quality and object point corresponding to this some picture compare that some is deteriorated.Namely, when for example subject is the resolution chart, project to picture, and the resolution of image of taking the resolution chart of the 1st pictorial data representation that the picture of this resolution chart obtains of the resolution chart on the sensitive surface by imaging lens system, be lower than the resolution as the resolution chart of subject.And, should " state of some picture " or " fringe of some picture " main deterioration state that represents the resolution of some picture.

In addition, if recovery coefficient is obtained separately this camera system by each camera system, then can obtain more accurately the recovery coefficient of the quality that can improve view data.

In addition, if recovery coefficient is that the fringe according to the some picture of the 1st pictorial data representation is selected from the candidate of each recovery coefficient corresponding with each fringe of the some picture that is divided into a plurality of kinds, then compare with the situation of each camera system being obtained separately recovery coefficient, can more easily obtain recovery coefficient.

And, if recovery coefficient be according to the fringe of a picture further proofread and correct to from the candidate of the multiple recovery coefficient corresponding with each fringe of this some picture that is divided into a plurality of kinds according to the recovery coefficient of the selected recovery coefficient that goes out of the fringe of the some picture of the 1st pictorial data representation, then compare with the situation of each camera system being obtained separately recovery coefficient, more easily obtain this recovery coefficient in the time of precise decreasing in the time of can suppressing to obtain recovery coefficient.

In addition, obtain the unit if camera system possesses the recovery coefficient of obtaining recovery coefficient, then can obtain more reliably recovery coefficient.

The camera system of the 2nd mode of the present invention has: the coefficient storage unit, when the maximum gauge in the effective coverage that projects to the some picture on the sensitive surface by imaging lens system relates to big or small more than 3 pixels, to by storing from recovery coefficient corresponding to the state (the following fringe that also is called a picture) of the some picture of the 1st pictorial data representation of imaging apparatus output; And signal processing unit, utilize above-mentioned recovery coefficient to the 1st view data implement to generate with when the resolution of imaging lens system is high from the restoration disposal of the 2nd equal view data of the 1st view data of imaging apparatus output; Signal processing unit will carry out restoration disposal as least unit by reaching the pixel region that adds up to more than 9 pixels that relates to that consists of more than horizontal 3 pixels more than vertical 3 pixels on the sensitive surface; Imaging lens system has successively from the thing side: comprise at least 1 lens and have the 1st set of lenses of positive focal power, comprise at least 1 lens and have the 2nd set of lenses of negative focal power, and comprise at least 1 lens and be positioned at the 3rd set of lenses that the most close lens as side have positive focal power, therefore, if at coefficient storage unit storage recovery coefficient, then can implement to utilize the restoration disposal of this recovery coefficient, thus, can easily improve the quality of the view data that the optical image that projects to sensitive surface obtains.

Namely, do not need as before when the resolution from the image of the 1st pictorial data representation of camera system output reaches predetermined level, not determine its reason and to regulate or assemble again again imaging lens system etc., merely the recovery coefficient corresponding with the fringe of the some picture of being taken by camera system is stored in the coefficient storage unit, only the 1st view data is implemented restoration disposal (image processing), the 2nd view data of the image of predetermined resolution can be obtained representing having, therefore the quality of taking the view data that projects to the optical image of sensitive surface and obtain can be improved.

And, as above-mentioned, also " state of some picture " is called " fringe of putting picture ".

In addition, if the recovery coefficient that the coefficient storage unit is obtained separately this camera system by each camera system storage, then can obtain more accurately recovery coefficient and carry out more accurately restoration disposal, therefore, can improve more reliably the quality of taking the view data that projects to the optical image of sensitive surface and obtain.

And, if coefficient storage unit storage from the candidate of each recovery coefficient corresponding with each fringe of the some picture that is divided into a plurality of kinds according to the selected recovery coefficient that goes out of the fringe of the some picture of the 1st pictorial data representation, then compare with the situation of obtaining separately recovery coefficient by each camera system, can more easily set recovery coefficient.

At this, if the recovery coefficient of having proofreaied and correct that the recovery coefficient that coefficient storage unit storage is selected according to the fringe according to this some picture of the 1st pictorial data representation in the candidate of the fringe pair multiple recovery coefficient corresponding with each fringe of this some picture that is divided into a plurality of kinds of a picture has further carried out correction, then compare with the situation of obtaining separately recovery coefficient by each camera system, in the time of precise decreasing in the time of can suppressing to obtain recovery coefficient, more easily obtain this recovery coefficient.

And, if possessing the recovery coefficient of obtaining recovery coefficient and being stored in the coefficient storage unit, camera system obtains the unit, then can obtain more reliably recovery coefficient.

In addition, if will comprising whole minimum pixel zone of the effective coverage of the some picture that projects on the sensitive surface, signal processing unit carries out restoration disposal as least unit, then can suppress the increase for the operand of carrying out restoration disposal, and can implement efficiently restoration disposal.

In addition, if signal processing unit carries out restoration disposal, so that the size of the effective coverage of the some picture in the image of the 2nd pictorial data representation, then can improve the quality of taking the view data that projects to the optical image of sensitive surface and obtain more reliably less than the size of the effective coverage of the some picture in the image of the 1st pictorial data representation.

In addition, the above-mentioned the 1st and the camera system of the 2nd mode in, if the most close lens face as side that is positioned in the 3rd set of lenses has axle outcurve point, or at central part to being concave surface as side at periphery to be convex surface as side, or the formula that satisfies condition (1) is formula 0.5H＜h＜H, then can improve more reliably the telecentric iris of imaging lens system, so can improve more reliably the quality of the 1st view data of expression subject.

Here, if the lens face of the thing side of the most close lens as side of being positioned in the 3rd set of lenses is convex surface and is concave surface at periphery to the thing side to the thing side at the central part of this lens face, then can improve more reliably the quality of the 1st view data of expression subject.

And, if imaging lens system is made of 3 einzel lenses, and the einzel lens of the 1st set of lenses is the meniscus shape of convex surface towards the thing side, the einzel lens of the 2nd set of lenses is the meniscus shape of convex surface towards the picture side, then can improve more reliably the quality of the 1st view data of expression subject.。

Camera head of the present invention, portable terminal device, mobile unit, Medical Devices have respectively the above-mentioned the 1st or the camera system of the 2nd mode, therefore, as mentioned above, can easily improve the quality of the optical image that projects to sensitive surface being taken the view data that obtains.

The camera system of the 3rd mode of the present invention has: the coefficient storage unit, when the maximum gauge in the effective coverage that projects to the some picture on the sensitive surface by imaging lens system relates to big or small more than 3 pixels, stored with by from recovery coefficient corresponding to the state of the some picture of the 1st pictorial data representation of imaging apparatus output; And signal processing unit, utilize above-mentioned recovery coefficient to the 1st view data implement to generate with when the resolution of imaging lens system is high from the restoration disposal of the 2nd equal view data of the 1st view data of above-mentioned imaging apparatus output; Signal processing unit will carry out restoration disposal as least unit by reaching the pixel region that adds up to more than 9 pixels that relates to that consists of more than horizontal 3 pixels more than vertical 3 pixels on the sensitive surface; Imaging lens system has successively from the thing side: comprise at least 1 lens and have the 1st set of lenses of positive focal power, comprise at least 1 lens and have the 2nd set of lenses of negative focal power, and comprise at least 1 lens and be positioned at the 3rd set of lenses that the most close lens as side have positive focal power; Therefore, with above-mentioned the 1st camera system similarly, by implementing to utilize the restoration disposal of recovery coefficient, can easily improve the quality of taking the view data that projects to the optical image of sensitive surface and obtain.

The manufacture method of camera system of the present invention, in the manufacturing of the camera system of above-mentioned the 3rd mode, to put picture by imaging lens system projects on the sensitive surface of imaging apparatus, in the coefficient storage unit storage with by recovery coefficient corresponding to the state of the some picture of the 1st pictorial data representation of exporting from imaging apparatus, so can make efficiently the 2nd camera system.

For example, even when not reaching predetermined level according to the situation on making etc. from the resolution of the image of the pictorial data representation of camera system output, also can process than the regeneration of camera system that easy enforcement of past improves the resolution of image.Namely, by recovery coefficient being stored in the camera system of coefficient storage unit, can easily implement to improve from the restoration disposal of the quality of the view data of this camera system output, therefore, the camera system regeneration that can be easily the resolution of image not be reached predeterminated level can obtain the camera system of resolution of the image of predeterminated level, can make efficiently camera system thus.

And, if generate in a large number camera system, can enjoy the larger effect of making efficiently above-mentioned camera system.

Description of drawings

Fig. 1 is the block diagram of the brief configuration of expression camera system of the present invention.

Fig. 2 (a) is the figure of the light distribution of expression point picture, and Fig. 2 (b) is the figure that expression projects to the some picture of sensitive surface.

Fig. 3 (a) is the figure at the image of the some picture shown in the image of the 1st pictorial data representation, and Fig. 3 (b) is the figure at the image of the some picture shown in the image of the 2nd pictorial data representation.

Fig. 4 (a) is the figure that the resolution Gao Shihui that is illustrated in imaging lens system projects to the light distribution of the some picture on the sensitive surface, and Fig. 4 (b) is the figure that projects to the some picture of sensitive surface at the resolution Gao Shihui of imaging lens system.

Fig. 5 is illustrated in the figure of variation of maximum gauge that the optical image that projects to this object point on the sensitive surface when optical axis direction moves object point is put the effective coverage of picture.

Fig. 6 is the figure of variation that is illustrated in the value (%) of the relevant MTF characteristic of the optical image that projects to this object point on the sensitive surface when optical axis direction moves object point.

Fig. 7 is the figure of the recovery coefficient acquisition device of expression the 2nd example.

Fig. 8 is the figure of the recovery coefficient acquisition device of expression the 3rd example.

Fig. 9 is illustrated in the figure that inside possesses the camera system of recovery coefficient acquisition device.

Figure 10 is the figure that the inside that is illustrated in signal processing part possesses the camera system of recovery coefficient acquisition device.

Figure 11 is the block diagram of the manufacture method of the expression brief configuration of camera system of the present invention and camera system.

Figure 12 is the figure of the recovery coefficient acquisition device of expression the 2nd example.

Figure 13 is the figure of the recovery coefficient acquisition device of expression the 3rd example.

Figure 14 is the figure that expression possesses the camera system of recovery coefficient acquisition device.

Figure 15 is illustrated in the figure that signal processing part possesses the camera system of recovery coefficient acquisition device and coefficient storage section.

Figure 16 is the profile of brief configuration of the imaging lens system of the expression camera system that is configured in embodiment 1.

Figure 17 is the figure of variation of the value of the MTF characteristic of expression when sensitive surface is defocused, Figure 17 (a) is the figure of variation of value of MTF characteristic of the spatial frequency of 20/mm of expression, Figure 17 (b) is the figure of variation of value of MTF characteristic of the spatial frequency of 30/mm of expression, Figure 17 (c) is the figure of variation of value of MTF characteristic of the spatial frequency of 40/mm of expression, and Figure 17 (d) is the figure of variation of value of MTF characteristic of the spatial frequency of 50/mm of expression.

Figure 18 is that expression is about the figure of the aberration of the imaging lens system of embodiment 1.

Figure 19 is the profile that expression is configured in the brief configuration of the imaging lens system in the camera system of comparative example.

Figure 20 is the figure of variation of the value of the MTF characteristic of expression when sensitive surface is defocused, Figure 20 (a) is the figure of variation of value of MTF characteristic of the spatial frequency of 20/mm of expression, Figure 20 (b) is the figure of variation of value of MTF characteristic of the spatial frequency of 30/mm of expression, Figure 20 (c) is the figure of variation of value of MTF characteristic of the spatial frequency of 40/mm of expression, and Figure 20 (d) is the figure of variation of value of MTF characteristic of the spatial frequency of 50/mm of expression.

Figure 21 is the figure that the automobile of the mobile unit that possesses camera system has been carried in expression.

Figure 22 is that the portable terminal device that expression possesses camera system is the figure of mobile phone.

Figure 23 is that the Medical Devices that expression possesses camera system are the figure of endoscope apparatus.

Among the figure: 10-imaging lens system, 20-imaging apparatus, 21-sensitive surface, 30-coefficient storage section, the 40-signal processing part, the recovery coefficient acquisition device of 70A-the 1st example, the recovery coefficient acquisition device of 70B-the 2nd example, the recovery coefficient acquisition device of 70C-the 3rd example, the 72-ideal point is as storage part, 74-as the diameter obtaining section, the 76-judging part, 78-recovery coefficient obtaining section, 79-candidate coefficient storage section, 100, the 200-camera system, G1-the 1st view data, G2-the 2nd view data, the F-restoration disposal, P1-point picture, K-recovery coefficient, the Dr-design data, ideal point is as status data, the Dk-coefficient data.

Embodiment

Below, utilize accompanying drawing that embodiments of the present invention are described.

(the first execution mode)

Fig. 1 is the block diagram of brief configuration of the camera system of expression the 1st execution mode of the present invention.

[about the structure of camera system]

Below the structure of the camera system of the 1st execution mode is described.

Camera system of the present invention 100 shown in Figure 1 has: imaging lens system 10; Imaging apparatus 20 has that two-dimentional shape is arranged a plurality of light receiving pixels and the sensitive surface 21 that consists of is taken the optical image P1 that projects to the subject on the sensitive surface 21 by imaging lens system 10, the 1st view data G1 of this subject of output expression; And signal processing part 40, to the 1st view data G1 implement to generate with when the resolution of imaging lens system 10 is high from the restoration disposal of the 2nd equal view data G2 of the 1st view data G1 of imaging apparatus 20 outputs.

Imaging lens system 10 has successively from object side (thing side): the 1st set of lenses that is made of at least 1 lens, have positive focal power; The 2nd set of lenses that is consisted of by at least 1 lens, have negative focal power; With consisted of by at least 1 lens, be positioned at the 3rd set of lenses that the most close lens as side have positive focal power.

Imaging lens system 10 and imaging lens system element 20 constitute, about projecting to some picture (P1) on the sensitive surface 21 from the arbitrarily position of X, Y, Z direction by imaging lens system 10, also so that the maximum gauge of the effective coverage of this some picture (P1) becomes the above size of 3 pixels that relates to light receiving pixel.

Here, the maximum gauge that projects to the effective coverage of the some picture on the sensitive surface 21 is this diameter as the effective coverage of P1 that projects on point on the sensitive surface 21 comprises maximum light receiving pixels as the effective coverage of P1 the direction.

And the direction that represents with arrow Z in Fig. 1 is the optical axis direction of imaging lens system 10, and the direction that represents with arrow X, Y is the direction parallel with sensitive surface 21.

Be provided with recovery coefficient acquisition device 70A in the outside of camera system 100, this recovery coefficient acquisition device 70A obtains with the point that is represented by the 1st view data G1 from imaging apparatus 20 outputs as recovery coefficient K corresponding to the fringe of P1.The recovery coefficient K that above-mentioned signal processing part 40 utilizes recovery coefficient acquisition device 70A to obtain implements restoration disposal F.

Here, camera system 100 can have the coefficient storage section 30 of the recovery coefficient K that storage recovery coefficient acquisition device 70A obtains, but this coefficient storage section 30 can be built in the signal processing part 40.And, might not need to arrange coefficient storage section 30 in camera system 100.

Above-mentioned recovery coefficient acquisition device 70A has: ideal point is as storage part 72, pre-stored have when in the optical system that comprises imaging lens system 10, not having error fully the design data relevant with a picture or with the ideal point that is superior to it as the relevant ideal point of state as any the data Dr in the status data; Diffusion of the point image state obtaining section 73, be used for obtaining the point that represented by the 1st view data G1 from imaging apparatus 20 outputs as the litura of the fringe of P1 as status data Db; And recovery coefficient obtaining section 78A, the litura of the above-mentioned fringe as P1 of the expression that input is obtained by this diffusion of the point image state obtaining section 73 is as status data Db and to be stored in ideal point be data Dr as the design data in the storage part 72 or ideal point as status data, and obtain point that expression represents with above-mentioned the 1st view data G1 as the coefficient data Dk of recovery coefficient K corresponding to the fringe of P1 by the computing that utilizes both, and the recovery coefficient K that this coefficient data Dk is represented is stored in the coefficient storage section 30.

In addition, the imaging lens system that is used for camera system of the present invention (the 2nd execution mode that comprises following explanation) is not limited to and must optical image " accurately " be imaged on imaging lens system on the sensitive surface by this imaging lens system, even by imaging lens system the imaging lens system that optical image " inaccurate " is imaged on the sensitive surface also can be adopted, therefore adopt in the present invention by imaging lens system with optical image " projection " on sensitive surface camera system and be described." not imaging " although state can be interpreted as so-called fuzzy picture, for example comprises the state of the some picture that the generation that caused by foozle is more spread than original some picture or owing to the restriction condition (size of optical system or cost) of design can only provide than the situation of the original conceivable point of design load self as large some picture.

In addition, as mentioned above, the litura of the deterioration state of the resolution of main expression point picture is as status data Db, such as representing a little as the size of the effective coverage of P1 or putting as the Luminance Distribution on the sensitive surface of P1 (CONCENTRATION DISTRIBUTION in image) etc.

[about the effect of camera system]

Then, the effect of above-mentioned camera system described.

1 example when at first, to obtaining recovery coefficient by the recovery coefficient acquisition device this recovery coefficient being stored in coefficient storage section describes.

The optical image that projects to the subject on the sensitive surface 21 by imaging lens system 10 is taken by imaging apparatus 20, is imported into diffusion of the point image state obtaining section 73 from the 1st view data G1 of the above-mentioned subject of expression of imaging apparatus 20 outputs.

Input the fringe of the some picture that 73 couples of the 1st view data G1 of diffusion of the point image state obtaining section of the 1st view data G1 represent and analyzed and exported the litura of its analysis result of expression as status data Db.

Recovery coefficient obtaining section 78A, input from the litura of diffusion of the point image state obtaining section 73 output as status data Db and pre-stored at ideal point as the design data the storage part 72 or as the data Dr of ideal point as status data, and obtain and put as recovery coefficient K corresponding to the fringe of P1 by the computing that utilizes both, and the coefficient data Dk of this recovery coefficient of output expression K.

Be imported into coefficient storage section 30 from the coefficient data Dk of the expression recovery coefficient K of recovery coefficient obtaining section 78A output, and the recovery coefficient K that represents at the 30 packing coefficient data Dk of this coefficient storage section.

And, as the example of the function that realizes diffusion of the point image state obtaining section 73, enumerate the D that D described later * O Labs company (France) makes * O analyzer (analyser).If adopt this D * O analyzer, can analyze to obtain by the 1st view data G1 that imaging apparatus 20 is exported point on the projection sensitive surface 21 as the fringe of P1.

[about restoration disposal]

Then, illustrate that utilization is stored in the recovery coefficient K of coefficient storage section 30 to carrying out restoration disposal F from the 1st view data of imaging apparatus 20 outputs and obtaining the resolution ratio by the situation of the 2nd view data of the higher image of the image of the 1st pictorial data representation.And in the following description, the situation of restoration disposal F is implemented in main explanation to the 1st view data of expression point picture.

Fig. 2 (a) represents that at the longitudinal axis light intensity E, transverse axis represent that the coordinate of the position of the directions X on the sensitive surface represents the figure of the light distribution of some picture.Fig. 2 (b) represents that at the longitudinal axis position, the transverse axis of the Y-direction on the sensitive surface represent on the coordinate of position of the directions X on the sensitive surface, expression consist of sensitive surface light receiving pixel each pixel region (representing with symbol Rg among the figure) and project to the figure of the some picture of this sensitive surface; Fig. 3 (a) is the figure at the image of the some picture shown in the image of the 1st pictorial data representation; Fig. 3 (b) is the figure at the image of the some picture shown in the image of the 2nd pictorial data representation.And, separately big or small consistent with each other of the pixel region (representing with symbol Rg ' among the figure) in the image that Fig. 3 (a) and Fig. 3 (b) represent respectively.And each the pixel region Rg that consists of the light receiving pixel of sensitive surface 21 becomes mutual corresponding zone with image-region Rg ' in the image that the 1st view data G1 or the 2nd view data G2 represent.

In addition, Fig. 4 (a) represents that at the longitudinal axis light intensity E, transverse axis represent that the resolution Gao Shihui that is illustrated in imaging lens system 10 projects to the figure of the light distribution of the some picture on the sensitive surface 21 on the coordinate of position of the directions X on the sensitive surface.In addition, this it is also conceivable that as representing irrespectively that with optical system desirable point is as state.Fig. 4 (b) represents that at the longitudinal axis position, the transverse axis of the Y-direction on the sensitive surface represent on the coordinate of position of the directions X on the sensitive surface, and each pixel region (representing with symbol Rg among the figure) that expression consists of the light receiving pixel of sensitive surface reaches at the resolution Gao Shihui of imaging lens system 10 and projects to point on the sensitive surface 21 as the figure of P2.

Be projected to optical image on the sensitive surface 21 by imaging lens system 10 and namely put maximum gauge M1 as the effective coverage R1 of P1, shown in Fig. 2 (b), relate to like that to consist of the size of 3 continuous pixels of the light receiving pixel of sensitive surface 21.In addition, this effective coverage R1 relates to the zone that adds up to 9 pixels by what vertical 3 pixels on the sensitive surface 21 and horizontal 3 pixels consisted of.That is, effective coverage R1 is the zone of 9 pixel portion (3 pixels * 3 pixels) of occupying the light receiving pixel that consists of sensitive surface 21.

In addition, shown in Fig. 2 (a), point has the expression point as the 1/e of the peak strength Ep1 among the light distribution H1 of P1 as the effective coverage R1 of P1 ²The zone of above light intensity.

The point that projects on the above-mentioned sensitive surface 21 is taken by imaging apparatus 20 as P1, represents that this 1st view data G1 as P1 exports from imaging apparatus 20.

Shown in Fig. 3 (a), still be expressed as this effective coverage R1 ' relates to 9 pixel portion (3 pixels * 3 pixels) in image image with above-mentioned shown in the image Zg1 that the 1st view data G1 represents as image P1 ' corresponding to P1.

Then, 40 pairs of the 1st view data G1 execution of signal processing part of having inputted this view data G1 utilize the restoration disposal F of recovery coefficient K1 and obtain the 2nd view data G2.

Shown in Fig. 3 (a), (b), the effective coverage R1 ' of the image P1 ' of the some picture among the image P2 ' of the some picture among the image Zg2 that the 2nd view data G2 that the image P1 ' of the some picture that represents with above-mentioned the 1st view data G1 is corresponding represents, the effective coverage R2 ' of this image P2 ' and image Zg1 that above-mentioned the 1st view data G1 represents compares and reduces.Therefore, the point that represents in image Zg2 is compared also as the maximum gauge M1 ' (zone of 1 pixel portion of image-region Rg ') of the image P1 ' of the some picture that represents among the maximum gauge M2 ' (zones of 3 pixel portion of image-region Rg ') of image P2 ' and the image Zg1 and is reduced.

Namely, the image P2 ' of the some picture that the 2nd view data G2 shown in this Fig. 3 (b) represents and projects to that point on the sensitive surface 21 is taken as P2 (with reference to Fig. 4) and becomes equal image from the image of the represented some picture of the 1st view data of imaging apparatus 20 outputs to the resolution Gao Shihui at imaging lens system 10.

More specifically, to take by imaging lens system 10 project to point that effective coverage R1 on the sensitive surface 21 relates to 9 pixel portion as P1 (with reference to Fig. 2 (a), (b)), and implement to utilize the restoration disposal F of above-mentioned recovery coefficient K and the image P2 ' (with reference to Fig. 3 (b)) of the represented some picture of the 2nd view data G2 that obtains from the 1st view data G1 of imaging apparatus 20 output, (the maximum gauge M2 of effective coverage R2 is included among the pixel region Rg, with reference to Fig. 4 (a) as P2 to estimate to project to point on the sensitive surface 21 when the resolution of imaging lens system 10 is improved, (b)) take, and become equal image from the image of the represented some picture of the 1st view data G1 of imaging apparatus 20 outputs.

And the point that a pixel region Rg on the sensitive surface 21 shown in Fig. 4 (a), (b) comprises is as the effective coverage R2 of P2, and is same with above-mentioned situation as P1, is the 1/e that has some the peak strength Ep2 among the light distribution H2 that represents as P2 ²The zone of above light intensity.Here, the effective coverage R2 as P2 is included in a size among the pixel region Rg.

Like this, the 1st view data is implemented restoration disposal and the resolution of the represented image of the 2nd view data that obtains, can be higher than the resolution of the image of the 1st pictorial data representation.

In addition, by this restoration disposal F, the identical image of image that obtains in the time of can obtaining with the depth of field that enlarges imaging lens system 10 is so above-mentioned restoration disposal also is called the in fact processing of the depth of field of amplifying camera lens 10.

And, based on signal processing part 40, utilize with the restoration disposal F of point as recovery coefficient K corresponding to the state of P1 that the 1st view data G1 represents in, can adopt in 2000-No. 123168 communiques of above-mentioned JP the 0002nd～0016 section image restoration processing of introducing etc.

In the above description the situation of shooting point picture is illustrated, but, the optical image that projects to the subject on the sensitive surface 21 by imaging lens system 10 is considered the set of the some picture of expression subject, so which kind of object is the subject of no matter taking be, also can implements restoration disposal and generate to be higher than the 2nd view data of resolution presentation video of the image of the 1st pictorial data representation above-mentioned the 1st view data.

[about the performance of camera system]

Then, the performance of the employed camera system that is made of imaging lens system 10 and imaging apparatus 20 of above-mentioned camera system 100 described.

Fig. 5 be at transverse axis with the representing apart from U, the longitudinal axis with on the coordinate of length corresponding to the quantity (N) of continuously arranged pixel region on the sensitive surface of logarithmic scale (m) the expression optical axis direction from the imaging lens system to the object point, schematically illustrate when moving object point along optical axis direction with project to sensitive surface on the figure of variation of maximum gauge of effective coverage of some picture corresponding to this object point.

Here, object point is moved to from the position (being close to the position of about 0.01m) of the near point that roughly contacts with imaging lens system with respect to imaging lens system roughly the position of the far point of infinity (approximately at a distance of 10m position).

By 3 kinds of curves (solid line) of the series A among Fig. 5-1, A-2, A-3 expressions, the variation of maximum gauge of effective coverage that imaging lens system 10 by camera system of the present invention projects to the each point picture of the mutually different specific region (specific region on the sensitive surface that image height is not identical each other) on the sensitive surface 21 is shown schematically.In addition, the curve (dotted line) that series A w among Fig. 5 is represented, expression by the employed imaging lens system of existing camera system (such as vehicle mounted camera, mobile telephone camera, Medical Devices with camera etc.) project on the sensitive surface point as the effective coverage maximum gauge variation.

According to Fig. 5 as can be known, in existing camera system, the maximum gauge of the effective coverage by object point being projected in the some picture that forms on the sensitive surface 21, along with the movement of object point along optical axis direction, from the size that relates to 1 pixel portion to the size of 30 pixel portion till and alter a great deal.

On the other hand, the imaging lens system 10 that possesses by camera system 100 of the present invention and object point is projected to the maximum gauge of the effective coverage of the some picture that forms on the sensitive surface 21 all relates to the size that 3 pixel portion are above, 10 pixel portion are following among series A-1, A-2, the A-3 any.That is, with range-independence from imaging lens system 10 to object point and with the some picture of institute projection in the position on the sensitive surface (for example image height on the sensitive surface) irrelevant, the change of the size of the effective coverage of the some picture on this sensitive surface is less.And about namely projecting to some picture on the sensitive surface from three-dimensional arbitrary position by imaging lens system 10 from arbitrary position of X, Y, Z direction, the size change of effective coverage that also can be said to its some picture is less.

Fig. 6 is on the coordinate of transverse axis with the value (%) that represents the MTF characteristic apart from U, the longitudinal axis of the optical axis direction till logarithmic scale (m) expression is from the imaging lens system to the object point, schematically illustrate when moving object point along optical axis direction with project to sensitive surface on the figure of variation of value (%) of the relevant MTF characteristic of the optical image of above-mentioned object point.

By 3 kinds of curves (solid line) of relevant camera system of the present invention of serial B-1, B-2, B-3 among Fig. 6 expression, the variation of value (%) of MTF characteristic that projects to the relevant optical image of the mutually different specific region (the mutually different specific region of image height) on the sensitive surface by imaging lens system 10 is shown schematically.In addition, the curve (dotted line) that the serial Bw among Fig. 6 is represented is that expression is about the general variation of the value (%) of the existing camera system MTF characteristic relevant with the optical image on projecting to sensitive surface.

As shown in Figure 6, in existing camera system, the value (%) of the MTF characteristic relevant with the optical image on projecting to sensitive surface 21 alters a great deal from 0% to surpassing till 80% the value.And the near point that approaches at imaging lens system 10 and object point becomes 0% position more near the object point in the zone (value of MTF characteristic is from 0% catadioptric zone) of imaging lens system 10 about being positioned at value than MTF characteristic, produces pseudo-the resolution.In addition, the far point that separates with object point at imaging lens system 10 becomes the object point in farther zone (value of MTF characteristic is from 0% catadioptric zone), 0% position about being positioned at value than MTF characteristic, also produce pseudo-the resolution.

On the other hand, the imaging lens system 10 that possesses by camera system 100 of the present invention projects to the value (%) of the relevant MTF characteristic of optical image on the sensitive surface 21, be the size below 60% more than 10% for serial B-1, B-2, B-3, do not produce pseudo-the resolution.That is, with from imaging lens system 10 to object point till range-independence and irrelevant with the position (image height) on the sensitive surface of the optical image of institute projection, the change of the value of the MTF characteristic relevant with the optical image on projecting to sensitive surface reduces, and does not also produce pseudo-the resolution.And, be that three-dimensional optional position can say also that by the relevant MTF characteristic of optical image that imaging lens system 10 projects on the sensitive surface change is less about the arbitrarily position from X, Y, Z direction.

And, imaging lens system 10 constitutes, about from the focal length that leaves this imaging lens system 10 (for example the arbitrarily position of X, the Y more than 4～5mm) 10 times, Z direction projects to the optical image of the subject on the sensitive surface 21 by this imaging lens system 10, also so that the value of the MTF characteristic relevant with this optical image just become.

In addition, with regard to this camera system 10, imaging lens system and imaging apparatus constitute, for example also be restricted in the scope of certain object height more than the 10f, about X, Y-direction being limited in about the Z direction, project to some picture on the sensitive surface for the optional position from X, the Y of object space, Z direction, the maximum gauge of the effective coverage of this some picture becomes the above size of 3 pixels of the light receiving pixel that relates to the sensitive surface that forms imaging apparatus.

But, imaging lens system 10 is not limited to satisfy the situation of this condition, if imaging lens system 10 and imaging apparatus 20 constitute, for projecting to some picture on the sensitive surface 21 from the optional position of X, Y, Z direction by this imaging lens system 10, also so that the maximum gauge of the effective coverage of this some picture becomes the above size of 3 pixels of the light receiving pixel that relates on the sensitive surface, the effect of the quality of the view data exported from imaging apparatus 20 of just can being improved.

As mentioned above, according to the camera system of the 1st execution mode of the present invention, the lack of resolution of the image of the 1st pictorial data representation of exporting in camera system as the past can merely only be implemented restoration disposal (image processing) to the 1st view data and be compensated.Namely, can obtain to represent to have the 2nd view data of the image of predetermined resolution by the restoration disposal to the 1st view data, so to projecting to that optical image on the sensitive surface is taken and the quality of the view data that obtains just easily is improved.

[about the effect of recovery coefficient acquisition device]

Below, the effect of recovery coefficient acquisition device 70A is at length described.

Function as recovery coefficient acquisition device 70A needs:

(1) uniformity in the picture is measured, judged to picture

(2) derivation provides the coefficient sets (recovery coefficient) of the restoration disposal of the best

(3) the best coefficient sets of record

Each function is described in detail.

(1) be in the combination of each imaging lens system and imaging apparatus, the function of actual measurement, judgement imaging performance (resolution).As the mechanism of measuring the optical point picture based on the signal of telecommunication that obtains from imaging apparatus (the 1st view data), the D of commercially available French D * O company * O analyzer is arranged.It is the mechanism that has utilized the fuzzy concept of the so-called B * U of expression that D * O company advocates, so can be according to obtain a picture (optical point picture, image process after some picture all can obtain) from the output signal of digital camera.

Particularly, this D * O analyzer is analyzed by the view data (the 1st view data) that the chart of taking certain appointment (arranging the chart of numerous bullet at white background) is obtained, and calculates the some picture size (http://www.dxo.com/jp/image_quality/dxo_analyzer) at the arbitrarily some place on the sensitive surface of imaging apparatus.

And, measure the mechanism of optical point picture so long as can get final product according to the measuring mechanism from the output signal calculation level picture of digital camera (being transducer), pay no attention to its form.

On the other hand, in the situation that can be calculated by the instrument of this optical system of design according to the size of the some picture of optical design value, so by this " design load point picture " that calculates with by the size of " the measurement point picture " of the measuring appliance measurement of D * O analyzer etc., can judge which kind of degree the measurement point picture is offset from design load by relatively.For example, the size of the measurement point picture in the assembly error situation is arranged at optics, mostly compare change greatly with design load point picture.In addition, project to that the shape of effective coverage of the some picture on the sensitive surface of imaging apparatus or Luminance Distribution are original to form point-symmetric shape or distribution, if but imaging lens system tilts or its axle offset, then produce partly front fuzzy, rear bluring, become so-called " single fringe ".Obtain thisly apart from the departing from of design load by more above-mentioned " design load point picture " and " measurement point picture ", and then can judge whether and to say as design load.In addition, even be not limited to design load point picture, also defining ideal state at random, relatively its perfect condition (" ideal point picture ") and " measurement point picture " is judged its difference.

(2) be to carry out take nuclear Weiner filter (Kernel Wiener Filter) as basic restoration disposal, and obtain by calculating and to make above-mentioned " measurement point picture " near the stage of the coefficient sets (recovery coefficient) of " design load point looks like " or " ideal point picture ".Nuclear dimension receives that wave filter such as document (Eagle swamp are good one, good fortune man of virtue and ability work under the mountain, exercise question " Kernel Wiener Filter ", 2003Workshopon Information-Based Induction Sciences, (IBIS2003), Kyoto, Japan, Nov 11-12,2003) shown in, the technical method as calculate original signal from the observation signal that comprises noise when original signal is observed through some filtering and with noise is widely used.Here, if original signal is made as " object that is taken ", be made as " imaging lens system+imaging apparatus " as filtering, observation signal is made as " picture signal (the 1st view data) ", and noise is made as " difference of design load point picture (perhaps ideal point picture) and measurement point picture ", then can uses the nuclear Weiner filter and calculate " object that is taken ".

If " imaging lens system+imaging apparatus " in kind do not have all source of errors, then captured object just should be picture signal, obtains desirable " picture signal (the 2nd view data) " on the principle after this restoration disposal of process.In fact, also there is measure error based on original (1) etc., noise contribution is not all removed and a residual part, but the fact that measurement point looks like near design load point picture or desirable some picture is reliably, is improved as the quality of final image.

Particularly, in the situation that since certain source of error and optical point picture greater than design load or inhomogeneous in imaging surface, also can by restoration disposal with this some picture proofread and correct for less or in imaging surface homogenizing, thereby can guarantee to stand the performance of practicality.In addition, being not only based on the source of error of making, having to have in the optical system of performance lower in the design (the optical point picture is greater than element spacing), also can look like to improve in appearance optical property by check point.Improve if pursue this apparent optical property, so the limiting resolution shown in then might surmounting in theory is very useful when the tendency of the miniaturization of considering Pixel Dimensions in recent years.

Here, limiting resolution is provided by the size of Airy disk, and the point of Aberrationfree lens is as the effective coverage (peak strength * (1/e of intensity ²)) radius R e and the radius R c that becomes intensity zero by stipulating with following formula.Pel spacing as the employed nearest cmos element of imaging apparatus is 2.2 microns, 1.75 microns, estimates that from now on 1.4 microns, 1.0 microns become main flow.As an example, if calculate Re and Rc with F2.8, wavelength 550nm, then be respectively:

Re (point is as the radius of the effective coverage of intensity)=0.82 λ F=0.82 * 2.8 * 550 * 0.001=1.26 micron (point is as 2.52 microns of the diameters of the effective coverage of intensity)

Rc (point becomes zero radius as intensity)=1.22 λ F=1.22 * 2.8 * 550 * 0.001=1.88 micron (point becomes 3.76 microns of zero diameters as intensity),

And pel spacing has surpassed diffraction limit.

Diffraction limit is take aberrationless as prerequisite, but the optical system of reality does not have aberrationless situation, and particularly in view of seeking miniaturization, cost degradation, aberration is residual on the contrary, haves no alternative but have the performance of compromise.Based on the restoration disposal of nuclear Weiner filter, under this situation, also can the degree of practicality will be arrived as the quality improvement of final image.

Above-mentioned restoration disposal is imagined on certain specific image planes or its (scope that front fuzzy rear mold is stuck with paste) execution very nearby, but in the countless image planes group that defocus direction corresponding with the change of photo distance, if consider the restoration disposal of the difference of elimination measurement point picture and design load point picture, then can enlarge the depth of focus.

In the execution of restoration disposal, the noise contribution that should eliminate is of all kinds according to each " imaging lens system+imaging apparatus ", wishes best restoration disposal is carried out in the combination of each " imaging lens system+imaging apparatus ".But the algorithm of restoration disposal self is identical to be got final product, so " coefficient sets " of reference the best gets final product.

(3) be the stage that in fact makes the group combination " best coefficient sets " of " imaging lens system+imaging apparatus ".For this reason, should in certain recording medium, store the group that is used for carrying out the coefficient sets of best restoration disposal and it is added to " imaging lens system+imaging apparatus ".Therefore, need recording process.

Like this, by camera system is used as the group of " imaging lens system+imaging apparatus+recording medium ", thereby optical some picture (also claiming the optical point picture) is corrected as the form that is fit to purposes, finally can obtain the image of good quality.Particularly, do not satisfy but the mechanism of the resolution that also can realize as the image after processing satisfying because of certain reason (manufacturing tolerance, original design load low) resolution even provide a kind of.In addition, can also provide the depth of focus consistent with the characteristic of the group of each imaging lens system and imaging apparatus to enlarge mechanism.

[about the variation of recovery coefficient acquisition device]

Below, the variation of recovery coefficient acquisition device is described.

In coefficient storage section 30, store and can be constituted by the recovery coefficient acquisition device from recovery coefficient K1 corresponding to the fringe of the some picture of the 1st pictorial data representation of imaging apparatus output: with the recovery coefficient acquisition device 70B of recovery coefficient acquisition device 70A the 2nd example different, that the following describes of above-mentioned the 1st example or the recovery coefficient acquisition device 70C of the 3rd example.

Fig. 7 is the figure of recovery coefficient acquisition device 70B of expression the 2nd example, this recovery coefficient acquisition device 70B the storage of coefficient storage section from the candidate of each recovery coefficient corresponding with each fringe of the some picture that is divided into a plurality of kinds according to the selected recovery coefficient that goes out of the fringe of the some picture of the 1st pictorial data representation.

As shown in Figure 7, this recovery coefficient acquisition device 70B has: candidate coefficient storage section 79 stores candidate K1, the K2 of each recovery coefficient corresponding with each fringe of the some picture that is divided in advance a plurality of kinds Diffusion of the point image state obtaining section 73 obtains by imaging lens system 10 and projects to point on the sensitive surface 21 as the fringe of P1; And recovery coefficient obtaining section 78B, candidate K1, K2 at above-mentioned recovery coefficient ... among the point selecting to represent with above-mentioned the 1st view data G1 as recovery coefficient corresponding to the fringe of P1 (for example K1), this recovery coefficient K1 is stored in the coefficient storage section 30.

This recovery coefficient acquisition device 70B obtains the litura of the fringe that represents the some picture as status data Db by diffusion of the point image state obtaining section 73, candidate K1, the K2 of the recovery coefficient of recovery coefficient obtaining section 78B from be stored in candidate coefficient storage section 79 ... the point that middle selection and litura represent as status data Db is as recovery coefficient corresponding to the fringe of P1 (for example K1), the coefficient data Dk of this recovery coefficient of expression K1 outputed in the coefficient storage section 30 store.

That is, in coefficient storage section 30 storage from candidate K1, the K2 of each recovery coefficient corresponding with each fringe of the some picture that is divided into a plurality of kinds ... in the selected recovery coefficient that goes out of the fringe of the some picture that represents according to the 1st view data G1.

Fig. 8 is the figure of recovery coefficient acquisition device 70C of expression the 3rd example, and this recovery coefficient acquisition device 70C store in coefficient storage section: the recovery coefficient of having proofreaied and correct that has further carried out correction according to the fringe of a picture according to the selected recovery coefficient that goes out of the fringe of this some picture of the 1st pictorial data representation from the candidate of the multiple recovery coefficient corresponding with each fringe of the some picture that is divided into a plurality of kinds.

As shown in Figure 8, this recovery coefficient acquisition device 70C has: candidate coefficient storage section 79 stores candidate K1, the K2 of each recovery coefficient corresponding with each fringe of the some picture that is divided in advance a plurality of kinds Ideal point is as storage part 72, pre-stored when having resolution at imaging lens system 10 high with project to by the high imaging lens system of this resolution desirable point on the sensitive surface 21 as the relevant design data of P1 or ideal point as status data data Dr; Diffusion of the point image state obtaining section 73 obtains by imaging lens system 10 and projects to point on the sensitive surface 21 as the fringe of P1; And recovery coefficient obtaining section 78C, candidate K1 from above-mentioned recovery coefficient, K2 ... middle selection with above-mentioned as recovery coefficient corresponding to the fringe of P1 (for example K1), and obtaining expression by utilizing above-mentioned fringe as P1 and the pre-stored computing that as status data is data Dr as design data or the ideal point of the some picture in the storage part 72 at ideal point this recovery coefficient K1 to be proofreaied and correct the coefficient data Dk (K1 ') of the recovery coefficient K1 ' that has proofreaied and correct that forms, the recovery coefficient K1 ' that has proofreaied and correct that this coefficient data Dk (K1 ') is represented is stored in the coefficient storage section 30.

This recovery coefficient acquisition device 70C obtains expression by diffusion of the point image state obtaining section 73 and projects to point on the sensitive surface 21 as the fringe data of the fringe of P1 by imaging lens system 10.Candidate K1, the K2 of the recovery coefficient that recovery coefficient obtaining section 78B stores from candidate coefficient storage section 79 ... middle selection with above-mentioned as recovery coefficient corresponding to the fringe of P1 (for example K1).And, obtain by utilizing above-mentioned fringe as P1 and pre-storedly this recovery coefficient K1 is proofreaied and correct the recovery coefficient K1 ' that has proofreaied and correct that forms at ideal point as the computing that design data or the ideal point of the some picture in the storage part 72 as status data is data Dr, and the recovery coefficient K1 ' that this has been proofreaied and correct is stored in the coefficient storage section 30.

That is, storage in coefficient storage section 30: the point that represents according to the 1st view data G1 from the candidate of the multiple recovery coefficient corresponding with each fringe of the some picture that is divided into a plurality of kinds is further implemented the recovery coefficient K1 ' that has proofreaied and correct corresponding to the correction of above-mentioned fringe as the selected recovery coefficient (for example K1) that goes out of the fringe of P1.

And, as shown in Figure 9, camera system of the present invention can be with camera system 100 in recovery

coefficient acquisition device

70A, 70B or 70C etc. have the recovery coefficient acquisition device 70 of identical function or housing that coefficient storage section 30 is arranged on above-mentioned camera system '.

And, as shown in figure 10, camera system of the present invention also can be the signal processing part 40 that is provided with built-in above-mentioned recovery coefficient acquisition device 70 or coefficient storage section 30 ' camera system 100 ".That is, can make signal processing part 40 ' double as recovery coefficient acquisition device 70.

[about the variation of each constituent element]

Below, the variation of the constituent element of camera system is described.

Signal processing unit be not limited to on the sensitive surface by the pixel region that adds up to more than 9 pixels carries out restoration disposal as least unit the situation that relates to more than vertical 3 pixels and more than horizontal 3 pixels, also can be by vertically less than 3 pixels or laterally carry out restoration disposal less than 3 pixels relating to less than the pixel region that adds up to 9 pixels of consisting of as least unit.

In addition, signal processing part is not limited to obtain by the computing of the 1st view data of the fringe of utilizing expression point picture the situation of recovery coefficient, also can obtain recovery coefficient by alternate manner.

In addition, signal processing part is not limited to the pixel region of minimum that comprises whole effective coverages of the some picture that projects on the sensitive surface is carried out as least unit the situation of restoration disposal, also can will comprise whole effective coverages but is not that minimum pixel region is carried out restoration disposal as least unit.

And, signal processing part be not limited to carry out restoration disposal so that the size of the effective coverage of the some picture in the image of the 2nd pictorial data representation less than the size of the effective coverage of the some picture in the image of the 1st pictorial data representation situation, can also be carry out restoration disposal so that the size of the effective coverage of the some picture in the image of the 1st pictorial data representation more than or equal to the situation of the size of the effective coverage of the some picture in the image of the 2nd pictorial data representation.

(the 2nd execution mode)

Figure 11 is the block diagram of brief configuration of the camera system of expression the 2nd execution mode of the present invention.

[about the structure of camera system]

Below, the structure of the camera system of the 2nd execution mode is described.

Camera system of the present invention 200 shown in Figure 11 has: imaging lens system 10; Imaging apparatus 20 has that two-dimentional shape is arranged a plurality of light receiving pixels and the sensitive surface 21 that consists of is taken the optical image P1 that projects to the subject on the sensitive surface 21 by imaging lens system 10, the 1st view data G1 of this subject of output expression; Coefficient storage section 30, when the maximum gauge in the effective coverage that projects to the some picture on the sensitive surface 21 by pick-up lens 10 related to big or small more than 3 pixels, storage and the point that is represented by the 1st view data G1 that exports from imaging apparatus 20 were as recovery coefficient K corresponding to the fringe of P1; And signal processing part 40, utilize the recovery coefficient K be stored in coefficient storage section 30 to the 1st view data G1 implement to generate with when the resolution of imaging lens system 10 is high from the restoration disposal of the 2nd equal view data G2 of the 1st view data G1 of imaging apparatus 20 outputs.

This signal processing part 40 take by more than vertical 3 pixels on the sensitive surface 21 and relating to of consisting of more than horizontal 3 pixels pixel region that adds up to more than 9 pixels carry out restoration disposal F as least unit.

The structure of imaging lens system 10 is identical with the structure of above-mentioned the 1st execution mode.

At this, project to point on the sensitive surface 21 becomes this effective coverage on the point that projects on the sensitive surface 21 comprises maximum light receiving pixels as the effective coverage of P1 the direction as the maximum gauge of the effective coverage of P1 diameter.

And the direction that represents with arrow Z among Figure 11 is the optical axis direction of imaging lens system 10, and the direction that represents with arrow X, Y is the direction parallel to sensitive surface 21.

At this, the recovery coefficient acquisition device 70A that is arranged at the outside of camera system 100 obtains with the point that is represented by the 1st view data G1 from imaging apparatus 20 outputs as recovery coefficient K corresponding to the fringe of P1, at 30 this recovery coefficient of the storage K of coefficient storage section.

This recovery coefficient acquisition device 70A has: ideal point is as storage part 72, pre-stored have when in the optical system that comprises imaging lens system 10, not having error fully the design data relevant with a picture or with the ideal point that is superior to it as the relevant ideal point of state as any the data Dr in the status data; The litura of its analysis result of expression is analyzed and obtained to diffusion of the point image state obtaining section 73 as status data Db to the fringe of the some picture that represented by the 1st view data G1 from imaging apparatus 20 output; Point is as diameter obtaining section 74, is used for obtaining by imaging lens system 10 projecting to point on the sensitive surface 21 as the maximum gauge of P1 effective coverage; Judging part 76 judges whether the above-mentioned maximum gauge of being obtained as diameter obtaining section 74 by point relates to the size more than 3 pixels on the sensitive surface 21; And recovery coefficient obtaining section 78A, when being judged as above-mentioned maximum gauge by judging part 76 and relating to big or small more than 3 pixels on the sensitive surface 21, input from the litura of diffusion of the point image state obtaining section 73 output as status data Db, and to be stored in ideal point be data Dr as the design data in the storage part 72 or ideal point as status data, and obtain expression and the coefficient data Dk of the point shown in above-mentioned the 1st view data G1 as recovery coefficient K corresponding to the fringe of P1 by the computing that utilizes both, and the recovery coefficient K that this coefficient data Dk is represented is stored in coefficient storage section 30.

[about the effect of camera system]

Then, the effect of above-mentioned camera system described.

The optical image that projects to the subject on the sensitive surface 21 by imaging lens system 10 is taken by imaging apparatus 20, is imported into diffusion of the point image state obtaining section 73 and point as diameter obtaining section 74 from the 1st view data G1 of the above-mentioned subject of expression of imaging apparatus 20 outputs.

In addition, the point of having inputted the 1st view data G1 is obtained the point that projects on the sensitive surface 21 is also exported this maximum gauge of expression as the maximum gauge of the effective coverage of P1 diameter data Dm as diameter obtaining section 74.Inputted the judging part 76 of the diameter data Dm that represents above-mentioned maximum gauge, whether judging point relates to size more than 3 pixels on the sensitive surface 21 as the maximum gauge of the effective coverage of P1, when being judged as maximum gauge and relating to big or small more than 3 pixels signal Te is exported.

Inputted the recovery coefficient obtaining section 78A of this signal Te, input from the litura of diffusion of the point image state obtaining section 73 output as status data Db and pre-stored be data Drs as design data or the ideal point of storage part 72 as status data at ideal point, and obtain and put as recovery coefficient K corresponding to the fringe of P1 by the computing that utilizes both, and the coefficient data Dk of this recovery coefficient of output expression K.

Be imported into coefficient storage section 30 from the coefficient data Dk of recovery coefficient obtaining section 78A output, and the recovery coefficient K that represents at the 30 packing coefficient data Dk of this coefficient storage section.

And, as the example of the function that realizes diffusion of the point image state obtaining section 73, enumerate the D that D described later * O Labs company (France) makes * O analyzer (analyser).If adopt this D * O analyzer, can analyze to obtain by the 1st view data G1 that imaging apparatus 20 is exported point on the projection sensitive surface 21 as the fringe (deterioration state of resolution) of P1 or the maximum gauge of effective coverage.

As above-mentioned, at the 30 storage recovery coefficient K of coefficient storage section, camera system 100 becomes the state that can carry out restoration disposal thus.

[about restoration disposal]

Utilization is stored in the recovery coefficient K of coefficient storage section 30, to carrying out restoration disposal F from the 1st view data of imaging apparatus 20 outputs, obtain resolution than the method for the 2nd view data of the image of the figure image height of the 1st pictorial data representation, can take the method identical with above-mentioned the 1st execution mode.

[about the variation of recovery coefficient acquisition device]

Below, the variation of recovery coefficient acquisition device is described.

Storage can constitute with recovery coefficient acquisition device by recovery coefficient K1 corresponding to the fringe of the some picture of the 1st pictorial data representation of exporting from imaging apparatus in coefficient storage section 30: with the recovery coefficient acquisition device 70B of recovery coefficient acquisition device 70A the 2nd example different, that the following describes of above-mentioned the 1st example or the recovery coefficient acquisition device 70C of the 3rd example.

Figure 12 is the figure of the recovery coefficient acquisition device 70B of expression the 2nd example, and Figure 13 is the figure of the recovery coefficient acquisition device 70C of expression the 3rd example.Figure 14 is the figure that expression possesses the camera system of recovery coefficient acquisition device, and Figure 15 is illustrated in the figure that signal processing part possesses the camera system of recovery coefficient acquisition device and coefficient storage section.And, in Figure 12～Figure 15, about having the constituent element of the function identical with the recovery coefficient acquisition device 70A of above-mentioned the 1st example, use the symbolic representation identical with the situation of the recovery coefficient acquisition device 70A of the 1st example.

As shown in figure 12, the recovery coefficient acquisition device 70B of the 2nd example has: candidate coefficient storage section 79 stores candidate K1, the K2 of each recovery coefficient corresponding with each fringe of the some picture that is divided in advance a plurality of kinds The litura that its analysis result of expression was analyzed and obtained to diffusion of the point image state obtaining section 73, the fringe of the some picture that the 1st view data G1 from imaging apparatus 20 output is represented as status data Db to recovery coefficient obtaining section 78B output described later; Point is as diameter obtaining section 74, is used for obtaining by imaging lens system 10 projecting to point on the sensitive surface 21 as the maximum gauge of the effective coverage of P1; Judging part 76 judges whether the above-mentioned maximum gauge that is obtained as diameter obtaining section 74 by point relates to the size more than 3 pixels on the sensitive surface 21; And recovery coefficient obtaining section 78B, when being judged as above-mentioned maximum gauge by judging part 76 and relating to big or small more than 3 pixels on the sensitive surface 21, candidate K1, K2 at above-mentioned recovery coefficient ... the point that middle selection and above-mentioned litura represent as status data Db is stored in this recovery coefficient K1 in the coefficient storage section 30 as recovery coefficient corresponding to the fringe of P1 (for example K1).

This recovery coefficient acquisition device 70B is obtained by imaging lens system 10 as diameter obtaining section 74 by point and projects to point on the sensitive surface 21 as the maximum gauge of the effective coverage of P1, and diameter data Dm that will this maximum gauge of expression is to judging part 76 outputs.Inputted the judging part 76 of diameter data Dm and judged whether above-mentioned maximum gauge relates to the above size of 3 pixels on the sensitive surface 21, be judged as when relating to big or small more than 3 pixels, the signal Te of this situation of expression has been exported to recovery coefficient obtaining section 78B.Candidate K1, the K2 of the recovery coefficient that the recovery coefficient obtaining section 78B that has inputted signal Te stores from candidate coefficient storage section 79 ... the point that middle selection and above-mentioned litura represent as status data Db is as recovery coefficient corresponding to the fringe of P1 (for example K1), the coefficient data Dk of this recovery coefficient of expression K1 outputed in the coefficient storage section 30 store.

That is, in coefficient storage section 30 storage from candidate K1, the K2 of each recovery coefficient corresponding with each fringe of the some picture that is divided into a plurality of kinds ... in the selected recovery coefficient (for example K1) that goes out of the fringe of the some picture that represents according to the 1st view data G1.

On the other hand, as shown in figure 13, the recovery coefficient acquisition device 70C of the 3rd example has: candidate coefficient storage section 79 stores candidate K1, the K2 of each recovery coefficient corresponding with each fringe of the some picture that is divided in advance a plurality of kinds Ideal point is as storage part 72, pre-stored have with when the resolution of imaging lens system 10 is high by the high imaging lens system of this resolution project to desirable point on the sensitive surface 21 as relevant design data or ideal point as status data data Dr; The litura that its analysis result of expression was analyzed and obtained to diffusion of the point image state obtaining section 73, the fringe of the some picture that the 1st view data G1 from imaging apparatus 20 output is represented as status data Db to recovery coefficient obtaining section 78C output described later; Point is as diameter obtaining section 74, is used for obtaining by imaging lens system 10 projecting to point on the sensitive surface 21 as the maximum gauge of the effective coverage of P1; And judging part 76, judge whether the above-mentioned maximum gauge that is obtained as diameter obtaining section 74 by point relates to the size more than 3 pixels on the sensitive surface 21.

And, this recovery coefficient acquisition device 70C has recovery coefficient obtaining section 78C, this recovery coefficient obtaining section 78C is when being judged as above-mentioned maximum gauge and relating to big or small more than 3 pixels on the sensitive surface 21 by judging part 76, candidate K1 from above-mentioned recovery coefficient, K2 ... middle selection and the point that represents as status data Db from the litura of above-mentioned diffusion of the point image state obtaining section 73 outputs are as recovery coefficient corresponding to the fringe of P1 (for example K1), and obtain expression by utilizing above-mentioned litura this recovery coefficient K1 to be proofreaied and correct the coefficient data Dk (K1 ') of the recovery coefficient K1 ' that has proofreaied and correct that forms as status data Db and the pre-stored computing that as status data is data Dr as design data or the ideal point of the some picture in the storage part 72 at ideal point, the recovery coefficient K1 ' that has proofreaied and correct of this coefficient data Dk (K1 ') expression is stored in the coefficient storage section 30.

This recovery coefficient acquisition device 70C obtains expression by point as diameter obtaining section 74 and projects to point on the sensitive surface 21 as the maximum gauge of the effective coverage of P1 by imaging lens system 10, and to the diameter data Dm of judging part 76 these maximum gauges of output expression.The above size of 3 pixels whether 76 pairs of above-mentioned maximum gauges of judging part of having inputted diameter data Dm relate on the sensitive surface 21 is judged, if be judged as when relating to above big or small of 3 pixels, will represent that then the signal Te of this situation exports to recovery coefficient obtaining section 78B.The candidate K1 of the recovery coefficient that the recovery coefficient obtaining section 78B that has inputted signal Te stores from candidate coefficient storage section 79, K2 ... the point that middle selection and above-mentioned litura represent as status data Db is as recovery coefficient corresponding to the fringe of P1 (for example K1), obtain by utilizing above-mentioned litura as status data Db, and the pre-stored computing that as status data is data Dr as design data or the ideal point of the some picture in the storage part 72 at ideal point the recovery coefficient K1 ' that has proofreaied and correct that this recovery coefficient K1 is further proofreaied and correct, and the recovery coefficient K1 ' that this has been proofreaied and correct is stored in coefficient storage section 30.

That is, in coefficient storage section 30 storage: the point that represents according to the 1st view data G1 from the candidate of the multiple recovery coefficient corresponding with each fringe of the some picture that is divided into a plurality of kinds is further implemented the recovery coefficient K1 ' that has proofreaied and correct corresponding to the correction of above-mentioned fringe as the selected recovery coefficient (for example K1) that goes out of the fringe of P1.

And camera system 200 can form as its part possesses recovery

coefficient acquisition device

70A, 70B, 70C, also can form any that does not arrange among recovery

coefficient acquisition device

70A, 70B and the 70C.

In addition, camera system 200 shown in Figure 14 ' the be recovery coefficient acquisition device 70 that will have the function identical with recovery

coefficient acquisition device

70A, 70B or 70C etc. is built in the camera system in the housing of above-mentioned camera system.Camera system can consist of like this.

And camera system 200 shown in Figure 15 " is the camera system in signal processing part 40 ' built-in recovery coefficient acquisition device 70 described above and coefficient storage section 30.Camera system also can consist of like this.

[about the performance of camera system]

Then, the camera system that is made of imaging lens system 10 and imaging lens system 20 for above-mentioned camera system 200 can have the performance equal with above-mentioned the 1st execution mode.

As above-mentioned, camera system according to the 2nd execution mode of the present invention, do not determine its reason and regulate or assemble again again imaging lens system etc. when not needing the resolution of the image of the 1st pictorial data representation as the past, exported in camera system not reach predetermined level, merely only in the coefficient storage part, store the recovery coefficient corresponding with the fringe of some picture and the 1st view data is implemented restoration disposal, just can obtain representing having the 2nd view data of the image of predetermined resolution, so can be to projecting to that optical image on the sensitive surface is taken and the quality of the view data that obtains just easily is improved.In addition, can also say the deficiency that easily to recover the resolution of camera system.

[about the variation of each constituent element]

Below, the variation of the constituent element of the camera system of the 2nd execution mode is described.

In addition, signal processing part is not limited to the minimum pixel zone that comprises whole effective coverages of the some picture that projects on the sensitive surface is carried out as least unit the situation of restoration disposal, also can will comprise whole effective coverages but is not that minimum pixel region is carried out restoration disposal as least unit.

And, signal processing part be not limited to carry out restoration disposal so that the size of the effective coverage of the some picture in the image of the 2nd pictorial data representation less than the size of the effective coverage of the some picture in the image of the 1st pictorial data representation situation, can also carry out restoration disposal so that the size of the effective coverage of the some picture in the image of the 1st pictorial data representation more than or equal to the size of the effective coverage of the some picture in the image of the 2nd pictorial data representation.

And, possess above-mentioned camera system camera head of the present invention, portable terminal device, mobile unit, and Medical Devices etc. require the dark device of the depth of field, can improve easily similarly that camera system that each device possesses be taken the optical image that projects to sensitive surface and the quality of the view data that obtains with above-mentioned.

And, camera system of the present invention, imaging lens system and imaging apparatus can constitute: for example also be restricted in the scope of certain object height more than the 10f, about X, Y-direction being limited in about the Z direction, project to some picture on the sensitive surface for the arbitrarily position from X, the Y of object space, Z direction, the maximum gauge of the effective coverage of this some picture also becomes the above size of 3 pixels of the light receiving pixel that relates to the sensitive surface that forms imaging apparatus.

In addition, imaging lens system preferably constitutes, about projecting to the optical image of the subject on the sensitive surface by this imaging lens system from the X more than 10 times, the Y of the focal length that leaves this imaging lens system, the optional position of Z direction, the value of the MTF characteristic relevant with this optical image just becomes.And, the expression of " leaving the position more than 10 times of the focal length of imaging lens system " " position that will consist of the optical axis intersection of the face of the most close object side in the lens face of imaging lens system and this imaging lens system is made as the reference position, and the optical axis direction from this reference position along this imaging lens system (Z-direction) leaves the position more than 10 times of focal length to object side ".

And, with regard to this camera system, imaging lens system and imaging apparatus also can constitute, only to projecting to some picture on the sensitive surface from the position that limits about at least arbitrarily direction of X, Y, Z direction by imaging lens system, make the maximum gauge of the effective coverage of this point picture become size more than 3 pixels that relate to the light receiving pixel that forms sensitive surface.In this case, the maximum gauge that can be only expression be projected to the effective coverage of the some picture on the sensitive surface becomes the 1st view data in the zone of the size on 3 pixels that relate to light receiving pixel to be implemented restoration disposal and obtains the 2nd view data.

Possess above-mentioned the 1st execution mode or the 2nd execution mode camera system camera head of the present invention, portable terminal device, mobile unit and Medical Devices etc. require the dark device of the subject depth of field, can with the above-mentioned quality that take the view data that obtains to optical image of the sensitive surface that projects to the camera system that each device possesses that similarly easily improves.

And, the camera system of the 1st execution mode of the present invention and the 2nd execution mode only can constitute and by the optics that is made of axisymmetric shape the optical image of subject be projected on the sensitive surface, perhaps, also can consist of by the optics that is consisted of by non-axisymmetric shape the optical image of subject is projected on the sensitive surface.And, the lens that the preferred depth of field of above-mentioned imaging lens system is dark.Namely, preferably imaging lens system and imaging apparatus are constituted: by the movement of subject or the focal adjustments of imaging lens system etc., even the state that the optical image of subject projects on the sensitive surface changes, the variation of the fringe of the some picture that projects on the sensitive surface is reduced.More specifically, imaging lens system and imaging apparatus being constituted the size of the effective coverage that makes the some picture that projects on the sensitive surface and the variation of contrast reduces.But camera system is not limited to possess the situation of the dark imaging lens system of the depth of field, also can possess the shallow imaging lens system of the depth of field.

In addition, the imaging apparatus that is used for the camera system of above-mentioned the 1st execution mode and the 2nd execution mode can be made as CCD element or cmos element.

[about the manufacture method of camera system]

Below, with reference to the manufacture method of Figure 11,12, the explanations such as 13 camera system of the present invention, that is, the recovery coefficient storing predetermined to the camera system that does not have storing predetermined recovery coefficient, thus the method for the camera system of having stored recovery coefficient made.

The manufacture method of this camera system is storage recovery coefficient and make the camera system 200A that stores recovery coefficient, the 200B that can carry out restoration disposal in coefficient storage section 30 ... method.

And,

camera system

200A, 200B ... be with reference to the identical system of the camera system 200 of Figure 11～Figure 15 explanation.

The manufacture method of above-mentioned camera system is

camera system

200A, 200B ... manufacture method, this camera system has: imaging lens system 10; Imaging apparatus 20 has that two-dimentional shape is arranged a plurality of light receiving pixels and the sensitive surface 21 that consists of, takes the 1st view data G1 that the optical image that projects to the subject on the sensitive surface 21 by imaging lens system 10 is exported this subject of expression; Signal processing part 40, will by more than vertical 3 pixels on the sensitive surface 21 and relating to of consisting of more than horizontal 3 pixels pixel region that adds up to more than 9 pixels as least unit to the 1st view data G1 implement to generate with when the resolution of imaging lens system 10 is high from the restoration disposal F of the 2nd equal view data G2 of the 1st view data G1 of imaging apparatus 20 outputs; And coefficient storage section 30, store the recovery coefficient K for restoration disposal; The recovery coefficient K that this camera system utilization is stored in the coefficient storage section 30 carries out restoration disposal.

This manufacture method will be put as P1 by imaging lens system 10 and project on the sensitive surface 21, store in coefficient storage section 30 with the point that is represented by the 1st view data G1 from imaging apparatus 20 outputs as recovery coefficient K corresponding to the state of P1.

The manufacture method of this camera system adopts the recovery coefficient acquisition device 70A of the 1st example of utilizing above-mentioned the 2nd execution mode, the recovery coefficient acquisition device 70B of the 2nd example or the recovery coefficient acquisition device 70C of the 3rd example to obtain recovery coefficient and this recovery coefficient is stored in each

camera system

200A, 200B ... the method of coefficient storage section.

Below, specifically describe the manufacture method of camera system of the recovery coefficient acquisition device 70C of the recovery coefficient acquisition device 70B of the recovery coefficient acquisition device 70A that utilizes the 1st example, the 2nd example and the 3rd example.And, for camera system 100A, 100B ... and the recovery coefficient acquisition device 70B of the recovery coefficient acquisition device 70A of above-mentioned the 1st example, the 2nd example, and the structure of the recovery coefficient acquisition device 70C of the 3rd example and effect etc., the content relevant with above-mentioned camera system 100 is identical, so the repetitive description thereof will be omitted, the content with the manufacture method of the unduplicated camera system of explanation of above-mentioned camera system 100 is described.

" about the manufacture method of the camera system corresponding with the recovery coefficient acquisition device 70A of the 1st example "

Be stored in respectively in manufacturing process corresponding to " 1 pair 1 " of camera system at the recovery coefficient that will obtain separately each camera system, need to carry out:

(1) uniformity in the picture is measured, judged to picture,

(2) derivation provides the coefficient sets (recovery coefficient) of the restoration disposal of the best,

(3) the best coefficient sets of record.

As each function, can be useful in the function that [effect of recovery coefficient acquisition device] of above-mentioned the 1st execution mode illustrates.

" about the manufacture method of the camera system corresponding with the recovery coefficient acquisition device 70B of the 2nd example "

Above-mentioned the 2nd method for optimizing as correcting optical system that is made of imaging lens system, imaging apparatus, signal processing circuit is made in narration, but has imagined the situation of producing at an easy rate a large amount of digital cameras as its location.In its manufacturing process, need to carry out:

(1) make up the storehouse of organizing for the coefficient (recovery coefficient) of restoration disposal,

(2) uniformity in the picture is measured, judged to picture,

(3) from the storehouse, provide the coefficient sets of restoration disposal of the best of group unit,

(4) coefficient sets of the best of record group unit.

Illustrate in greater detail each function.

(1) is in advance the imaging lens system that roughly can enlist the services of the quantity of overall trend (for example 1/10th of all lot numbers) to be measured, its resolution trend (bad trend) is divided into groups.Computing is to the restoration disposal of the best of its each group, and obtaining respectively, the coefficient sets of the best of the unit of group makes up the storehouse.Ideally, it is desirable pressing " 1 pair 1 " corresponding distribution coefficient group as the 1st example, but is not suitable in the time of maybe will suppressing cost in mass-produced situation.Therefore, as the present embodiment, integral body is divided into group in a way, make the storehouse of obtaining the optimum solution under its group unit.

(2) identical with (1) of the 1st example, still, look like to belong to the judgement of which group of obtaining with (1) of above-mentioned the 2nd example according to measurement point.In fact, when carrying out above-mentioned grouping, also be assigned to group (for example 9/10ths of all lot numbers) for beyond measuring in advance.

(3) be that extraction is by the stage of the coefficient sets of the best of the group of above-mentioned (2) judgement from the storehouse, selecteed coefficient sets is applied to the group of this " imaging lens system+imaging apparatus ".At this moment, do not obtain one by one optimum system array to the group of each " imaging lens system+imaging apparatus ".Thus, can shorten for the 1st routine required operation time, can realize at an easy rate a large amount of productions.

(4) identical with (3) of the 1st example.

" about the manufacture method of the camera system corresponding with the recovery coefficient acquisition device 70C of the 3rd example "

Above-mentioned the 3rd method for optimizing as correcting optical system that is made of imaging lens system, imaging apparatus, signal processing circuit is made in narration, but has imagined the situation of producing at an easy rate a large amount of digital cameras as its location.In its manufacturing process, need to carry out:

(2) uniformity in the picture is measured, judged to picture,

(3) from the storehouse, provide the coefficient sets of best restoration disposal,

(4) part is revised this coefficient sets,

(5) record the coefficient sets that is modified.

Illustrate in greater detail each function.

(1) (2) (3) are identical with (1) (2) (3) of the 2nd example.

(4) be the process that part is revised the coefficient sets that extracts.Coefficient sets becomes the arrangement of certain numerical value, the modification that still " imaging lens system+imaging apparatus " of only revising its part is needed.From optimized above-mentioned the 1st example of all coefficient sets is different, only revise the part of coefficient, so shorter getting final product on the time.

(5) be the stage of recording the coefficient sets of having proofreaied and correct of revising, consist of thus the group of " imaging lens system+imaging apparatus+recording medium ".

As above such, the camera system of the manufacture method manufacturing by camera system of the present invention can easily improve the quality of taking the view data that obtains to projecting to optical image on the sensitive surface.

[about lens arrangement and the effect of imaging lens system]

Then, structure and the effect of the camera system of the embodiment 1 that is used for above-mentioned

camera system

100 and 200 are described particularly.The imaging lens system 10A described later etc. that is used for the camera system of above-described embodiment 1 becomes the embodiment of above-mentioned imaging lens system 10.

And, as described later, above-mentioned imaging lens system 10 has successively from object side (thing side): the 1st set of lenses G-1 that is made of at least 1 lens, have positive focal power, the 2nd set of lenses G-2 that is consisted of by at least 1 lens, have negative focal power, and consisted of by at least 1 lens, be positioned at the 3rd set of lenses G-3 that the most close lens as side have positive focal power.

" about the camera system of embodiment 1 "

Figure 16 is the profile of brief configuration of the imaging lens system 10A that is made of 3 einzel lenses of expression embodiment 1, Figure 17 (a)～(d) represents to have by imaging lens system 10A projection on the coordinate of defocus amount Ud (μ m), value (%) that the longitudinal axis represents the MTF characteristic of optical axis direction (Z-direction) of sensitive surface of picture of subject at transverse axis, is illustrated in the figure of variation of the value (%) of the MTF characteristic that projects to the optical image on this sensitive surface when with respect to above-mentioned imaging lens system sensitive surface being defocused.Here, the de-focus region of sensitive surface 21A is 400 μ m.

In more detail, above-mentioned Figure 17 (a)～(d) is the figure of variation that is illustrated in the value (%) of MTF characteristic when under the fixing state of subject with respect to the position of imaging lens system 10A sensitive surface 21A being defocused, relevant with the optical image that is projected as various image heights.Figure 17 (a) is the figure of variation of value of MTF characteristic of the spatial frequency of 20/mm of expression, Figure 17 (b) is the figure of variation of value of MTF characteristic of the spatial frequency of 30/mm of expression, and Figure 17 (c) is that figure, Figure 17 (d) of variation of value of the MTF characteristic of 40/mm of expression spatial frequency is the figure of variation of value of MTF characteristic of the spatial frequency of 50/mm of expression.

And, the direction that direction (value of Ud is near the direction of 400 μ m) the expression imaging lens system that the value of the transverse axis Ud of expression defocus amount shown in Figure 17 increases and sensitive surface separate, the direction that value reduces (value of Ud near 0 direction) expression sensitive surface and the approaching direction of imaging lens system.

As shown in figure 16, imaging lens system 10A along optical axis C (Z axis) from object side (arrow the figure-Z direction side) be aligned in sequence with aperture diaphragm Sat, corresponding to the 1st einzel lens La1 of the 1st set of lenses G-1, corresponding to the 2nd einzel lens La2 of the 2nd set of lenses G-2, corresponding to the 3rd einzel lens La3, the optics GLa1 of the 3rd set of lenses G-3.And lens face R1, R3 shown in Figure 16, R5 represent respectively the face of the light incident side of each einzel lens La1～La3, and lens face R2, R4, R6 represent respectively the face of the exiting side of each einzel lens La1～La3.By above-mentioned imaging lens system 10A the optical image of subject is projected on the sensitive surface 21A.

And, object side at sensitive surface 21A, according to structure preferred disposition cover glass, low pass filter or the infrared intercepting filter etc. of camera system, the example of these the optics GLa1 that does not have focal power that is the parallel flat shape is imagined in configuration shown in Figure 16.In addition, aperture diaphragm Sat does not represent shape or size and position on the expression optical axis Z.

In addition, in Figure 16, from axle glazed thread Ja1 to the off-axis ray Ja7 with maximum field of view's angle incident, from the low side of image height 7 light Ja1, Ja2, Ja3, Ja4, Ja5, Ja6, Ja7 are shown successively.

And 7 MTF curve M ta20 of record are illustrated in the variation of value of MTF characteristic of spatial frequency of 20/mm of the position of above-mentioned 7 ray casts to the sensitive surface 21A among Figure 17 (a).7 MTF curve M ta30 of record are illustrated in the variation of value of MTF characteristic of spatial frequency of 30/mm of position same as described above among Figure 17 (b), 7 MTF curve M ta40 of record also represent the variation of value of MTF characteristic of spatial frequency of 40/mm of position same as described above among Figure 17 (c), and 7 MTF curve M ta50 of record are also illustrated in the variation of value of MTF characteristic of spatial frequency of 50/mm of position same as described above among Figure 17 (d).

In addition, in formation example shown in Figure 16, be illustrated in the example of configuration optics GLa1 between the 3rd einzel lens La3 and the sensitive surface 21A, but between each lens, also can configure the various filters of low pass filter or cut-off specific band.Perhaps, can impose at the lens face from any lens of the 1st einzel lens La1 to the 3 einzel lens La3 the surface treatment (coating) that has with the same effect of various filters.

This imaging lens system 10A has successively from the thing side: the 1st set of lenses G-1 with positive focal power is einzel lens La1; The 2nd set of lenses G-2 with negative focal power is einzel lens La2; And the 3rd set of lenses G-3 with positive focal power is einzel lens La3; The lens face R6 that is positioned at as side corresponding to the einzel lens La3 of the 3rd set of lenses G-3 has axle outcurve point Qa.

And as mentioned above, bent point is the point on the lens face, in the situation vertical with optical axis C (Z axis) of the section of this point, this point is called bent point.And, be called axle outcurve point with on the lens face with some optical axis intersection song point in addition.

With regard to this imaging lens system 10A, the 3rd set of lenses be positioned at the most close lens face R6 as side be central part at this lens face R6 to being concave surface as side at periphery to the lens face that is convex surface as side.And this lens face R6 satisfies following conditional (1).

0.5H<h<H……(1)

Wherein,

H: the effective radius of lens face R6

H: the distance from the axle outcurve point Qa of lens face R6 to optical axis.

In addition, the distance h from the axle outcurve point Qa of lens face R6 to optical axis also is called the section becomes point on 0 the aspheric surface apart from the height of optical axis with respect to the gradient in the section (plane vertical with optical axis) on aspheric surface summit.

And, be einzel lens La3 about the most close lens as side that are positioned at of the 3rd set of lenses G-3 of this imaging lens system 10A, the lens face R5 of thing side is convex surface in the middle mind-set thing side of this lens face R5, is concave surface at periphery to the thing side.

In addition, the einzel lens La1 that consists of the 1st set of lenses G-1 be convex surface towards the meniscus shape of thing side, the einzel lens La2 that consists of the 2nd set of lenses G-2 is convex surface towards the meniscus shape of picture side.

Below, the design data of the imaging lens system 10A that embodiment 1 is related to describes.

Table 1 illustrates lens data and various data, and table 2 illustrates each coefficient of the aspheric surface formula on each aspheric surface, and table 3 illustrates the concise and to the point specification of imaging lens system 10A.

[table 1]

Embodiment 1 (three lens)

The face number	Ri	Di	Ndj	v dj
					Aperture diaphragm	∞	-0.070
1*	1.060	0.672	1.47136	77.6
					2*	2.298	0.799
3*	-2.168	0.570	1.60595	27.0
					4*	-5.366	0.250
5*	1.313	0.690	1.53159	55.4
					6*	1.429	0.500
7	∞	0.300	1.51633	64.1
					8	∞	0.522
Image planes	∞	0.000

Focal length 3.847

F value 3.5

[table 2]

Embodiment 1 (three lens)

The face number	K	A3	A4	A5	A6
							1	1.67530380	-0.01932744	-0.02985018	-0.12489137	-0.01225001

[0323]

2	8.15043250	0.03605327	-0.04792006	0.11130041	0.31864904
						3	1.98987400	-0.01691895	-0.02882516	-0.04157052	-0.10622967
4	-22.94585750	-0.28231890	0.08051906	-0.04346302	0.03066265
						5	-2.24143450	-0.32245902	-0.01054630	0.05102366	0.02042473
6	-3.33611150	-0.08863879	-0.10108346	0.07800228	-0.00239551

The face number	A7	A8	A9	A10
						1	0.27595695	0.10620366	-0.67945287	-0.08377876
2	-0.16205189	-0.29792806	-1.71742400	2.93183590
					3	-0.03383005	0.12327341	0.25461410	-0.35326388
4	-0.01891840	0.01135644	0.02101196	-0.01119125
					5	-0.01256704	-0.00258553	0.00610633	-0.00217838
6	-0.01183056	-0.00321420	0.00422294	-0.00081224

[table 3]

Embodiment 1 F value 3.5/ focal length 3.847mm3 chip architecture

Shown in the below of the lens data of table 1, the focal distance f of imaging lens system 10A is 3.847mm, and the F value is 3.5.

In the lens data of table 1, the face number represent take the lens face of the most close object side as the 1st, along with towards the i that increases successively as side (i=1,2,3 ...) the face number.And table 1 also comprises aperture diaphragm Sat and optics GLa1 record, has also put down in writing the face number (i=7,8) of optics GLa1.

The Ri of table 1 represent i (i=1,2,3 ...) the paraxial radius of curvature of face, Di represent i (i=1,2,3 ...) face interval on the optical axis Z of individual face and i+1 face.The symbol Ri of the Ri of table 1 and Figure 16 (i=1,2,3 ...) correspondence.

The Ndj of table 1 represent take the optical considerations of the most close object side as the 1st, along with towards the j that increases successively as side (j=1,2,3 ...) optical considerations to the refractive index of d line (wavelength 587.6nm), vdj represents that j optical considerations is to the Abbe number of d line.In table 1, the unit at paraxial radius of curvature and face interval is mm, nearby the paraxial curvature radius just be made as for protruding situation at object side (thing side), as side to be that protruding situation is made as negative.

In the lens data of table 1, aspheric surface is at the additional * mark of face number.Each aspheric surface is defined by following aspheric surface formula.

[mathematical expression 1]

Z = \frac{Y^{2} / R}{1 + {(1 - K \cdot Y^{2} / R^{2})}^{1 / 2}} + Σ_{i = 3}^{20} {AiY}^{i}

Z: the aspheric surface degree of depth (point on the aspheric surface of height Y hangs down into the length perpendicular to the vertical line on the plane of optical axis tangent with the aspheric surface summit)

Y: highly (from the distance of optical axis)

R: paraxial radius of curvature

K, Ai: asphericity coefficient (i=3～20)

Each aspheric each COEFFICIENT K, A3, A4, A5 in the table 2 expression aspheric surface formula ... value.

Each the einzel lens La1～La3 that consists of imaging lens system 10A all be light incident side and exiting side lens face both be simultaneously aspherical shape.

In addition, the maximum dimension D max of the effective coverage of the some picture in the camera system of embodiment shown in the table 31, pixel quantity (quantity of the pixel region) Ngs corresponding with the maximum dimension D max of the effective coverage of putting picture, the relation of the shortest photo distance Sk, depth of focus Sd.

And, the distance of the axle outcurve point of " h " expression from optical axis to said lens face R6 on the hurdle of " h:H/2 " in the table 3.In addition, " H/2 " illustrates 1/2 the size (size of 0.5H) of the effective radius H of lens face R6.Here, lens face R6 satisfies the conditional (1) of above-mentioned " 0.5H＜h＜H " as can be known.

In addition, the pixel quantity Ngs in the table 3 illustrates the quantity of the pixel region corresponding with the maximum gauge of the effective coverage of a picture by each the pixel pitch Pg (2.2 μ m, 1.85 μ m, 1.4 μ m) of the pixel region on the sensitive surface.Here, the value of pixel quantity Ngs is obtained according to the formula of pixel quantity Ngs=maximum dimension D max/ pixel pitch Pg.

The maximum dimension D max of the effective coverage of above-mentioned some picture is the diameter that the effective coverage of this some picture comprises the effective coverage of the some picture on the direction of maximum pixels, and pixel pitch Pg is the pitch of the pixel region (light receiving pixel) on the above-mentioned direction.

The shortest photo distance Sk be with imaging lens system for the recommendation when the practicality, expression is from projecting to imaging lens system on the sensitive surface to the beeline of subject with the picture of subject with the resolution of expectation.This beeline is by distance (photo distance) expression till the subject of the lens face (being lens face R1 here) of the most close object side (thing side) of imaging lens system.

This shortest photo distance is comprised in and can obtains the optical image that projects to sensitive surface is taken and in the scope of the photo distance of the effect that the quality of the view data that obtains is improved by restoration disposal.

And in the camera system of embodiment 1, the scope of the photo distance of the effect that the quality that can obtain view data is improved by restoration disposal is the scope of photo distance 0 to ∞ (infinity), is the gamut that can take subject.

Depth of focus Sd is illustrated in fixedly when under the state of subject to the position of imaging lens system sensitive surface being defocused, and can the picture of subject be projected to the scope that defocuses on the sensitive surface to stipulate above resolution.This depth of focus Sd is in the precalculated position fixedly under the state of sensitive surface to the position of imaging lens system, is considered in a way and can subject be projected to value corresponding to the scope of the photo distance on the sensitive surface with predetermined resolution.That is, if the value of depth of focus Sd increases, then can think with predetermined resolution the scope that subject projects to the photo distance on the sensitive surface also to be enlarged.

According to table 3 as can be known, the camera system of embodiment 1 constitutes: the effective coverage of the some picture on projecting to sensitive surface 21A is more than the 9 μ m and the pixel pitch that consists of the light receiving pixel of sensitive surface 21A is 2.2 μ m when following, and the maximum gauge of the effective coverage of some picture relates to more than 3 pixels (4.1 pixel).

16f (approximately 61.5mm) when in addition, the maximum dimension D max of the value of the shortest photo distance Sk in the effective coverage of the picture of setting up an office is 9 μ m.

The maximum dimension D max of the value of the depth of focus Sd of imaging lens system 10A in the effective coverage of the picture of setting up an office is 300 μ m when being 9 μ m.

Value about the MTF characteristic relevant with the camera system of above-described embodiment 1, make sensitive surface 21A and imaging lens system 10A near the time, the value of defocus amount Ud is 0 o'clock in Figure 17 (a)～(d), spatial frequency 20～50Line/mm (also claims the value of all MTF characteristics of root/mm) for just.

In addition, with sensitive surface 21A during away from imaging lens system 10A, when the value of establishing defocus amount in Figure 17 (a)～(d) is 300 μ m, the value of all MTF characteristics of spatial frequency 20～50Line/mm is for just.

That is, be in the scope of 0～300 μ m the time in the value of defocus amount, spatial frequency in the value of all MTF characteristics of 20～50Line/mm for just.

In the value of defocus amount when being 300 μ m to the scope of 400 μ m, spatial frequency in the value of the MTF of 30～50Line/mm characteristic from 0% counter-rotating and produce pseudo-the resolution.Represent to produce the pseudo-scope of differentiating with arrow G ik among the figure.

Here, with project to sensitive surface on the value of the relevant MTF characteristic of the picture of subject greater than 0% the time, take this view data that looks like to obtain and hold the information that optical significance is arranged, have the data of implementing restoration disposal and can improving the possibility of resolution so this view data becomes.But, the value of the MTF characteristic relevant with the picture of subject on projecting to sensitive surface is 0% or catadioptric when producing pseudo-the resolution from 0%, take this view data that looks like to obtain and do not hold the information that optical significance is arranged, therefore, even this view data is implemented restoration disposal, can not improve the quality (resolution of the image of pictorial data representation) of view data.

According to the above-mentioned fact, if adopt this camera system, under the predetermined state of the position relationship of fixedly sensitive surface 21A and imaging lens system 10A, when making photo distance change to the scope of 16f～∞, can make by the MTF characteristic that subject is projected to the picture that forms on the sensitive surface 21A becomes all the time than 0% large value (can make it not produce pseudo-the resolution).

That is, be the scope of 16～∞ at photo distance, can make the picture that projects to the subject on the sensitive surface 21A become significant picture.

And, when in the scope of 0～∞, changing photo distance, the effective coverage that projects to the some picture on this sensitive surface 21A becomes the above size of 3 pixels that relates on the sensitive surface 21A, implements the resolution that restoration disposal improves image so can take the view data that obtains by the subject that this scope is existed.

That is, the camera system by embodiment 1 is taken the view data that obtains at the picture of the various subjects of the scope of 16f～∞ and can be said and satisfy the precondition (improving the condition of resolution) that is used for implementing restoration disposal the photo distance that comprises that projects on the sensitive surface 21A.

And, suppress can more easily carry out restoration disposal for less by the size change that will project to the some picture on the sensitive surface 21A.Namely, for example, even the picture that projects on the sensitive surface comprises the subject that places mutually different various photo distances, if it is identical to consist of the fringe of some picture of picture of each subject, then place the view data of the subject of any position for expression, also change parameter and carry out restoration disposal not.Thus, can alleviate the burden of the signal processing part of the computing of carrying out restoration disposal.

On the other hand, to utilize all the time identical parameter to carry out restoration disposal in the situation of prerequisite, if projecting to formation on the sensitive surface, to be positioned at the fringe of some picture of picture of subject of mutually different various photo distances identical, then pass through to implement restoration disposal, thereby the view data that expression is positioned at the subject of any position also can similarly improve the resolution that represents the image of its subject.That is, by the enforcement of restoration disposal, can improve equably about integral image the resolution of image.

Like this, the design of the depth of focus by implement increasing imaging lens system 10A, thereby by the picture of various subjects that photo distance is positioned at the scope of 16f～∞ of comprising that projects to by imaging lens system 10A on the sensitive surface 21A is taken the resolution of the represented integral image of the view data that obtains and can be utilized restoration disposal to be improved.

In addition, according to the imaging lens system 10A that as above designs like that, the light that incides sensitive surface 21A can be reduced with respect to the incidence angle of this sensitive surface 21A, that is, the good imaging lens system of telecentric iris can be obtained.

" about the aberration at the imaging lens system of embodiment 1 explanation "

Figure 18 is the figure of the expression aberration relevant with imaging lens system 10A, in Figure 13 respectively from be illustrated in successively each aberration diagram of the imaging lens system that embodiment 1 illustrates according to the order of spherical aberration (also claiming spherical aberration), astigmatism (also claiming astigmatism), distortion aberration (distortion aberration) (also claiming distortion), multiplying power chromatic aberation.

In aberration diagram, the aberration take e line (wavelength 546.07nm) as reference wavelength is shown, but in spherical aberration diagram and multiplying power chromatic aberation figure, also represents the aberration about F line (wavelength 486.1nm), C line (wavelength 656.3nm).(parameter is processed, 0≤θ≤ω), establishing desirable image height is f * tan θ, expression and its departure for the focal distance f that the desiring to make money or profit of aberration of distorting used whole system, angle of half field-of view θ.

" about the camera system of comparative example "

Below, illustrate that as a comparative example mobile phone is with the existing imaging lens system of camera etc.

Figure 19 is the profile of brief configuration of the imaging lens system that is made of 4 einzel lenses of expression comparative example, Figure 20 (a)～(d) represents on the coordinate of the defocus amount Ud (μ m) of the optical axis direction (Z-direction) of sensitive surface, value (%) that the longitudinal axis represents the MTF characteristic at transverse axis, and expression projects to the figure of variation of value (%) of the MTF characteristic of the optical image on this sensitive surface when with respect to above-mentioned imaging lens system sensitive surface being defocused.Here, the de-focus region of sensitive surface is 400 μ m.

In addition, Figure 20 (a)～(d) of expression MTF characteristic is corresponding to Figure 17 (a)～(d) of the expression MTF characteristic relevant with above-mentioned imaging lens system 10A etc.

As shown in figure 19, (arrow the figure-Z direction side) is arranged with respectively the 1st einzel lens Lh1, the 2nd einzel lens Lh2, the 3rd einzel lens Lh3, the 4th einzel lens Lh4, reaches optics GLh1 the imaging lens system 10H of comparative example successively along optical axis C (Z axis) from object side.Having these 4 signal-lens imaging lens system 10H is designed to be the depth of field and deepens.

By above-mentioned imaging lens system 10H the optical image of subject is projected on the sensitive surface 21H.

And optics GLh1 is the optics that does not have focal power that is made of parallel flat.

In addition, in Figure 20 (a)～(d), from axle glazed thread Jh1 to the off-axis ray Jh5 with maximum field of view's angle incident, from the low side of image height 5 light Jh1, Jh2, Jh3, Jh4, Jh5 are shown successively.

And 5 MTF curve M th20 of record represent the variation of value of MTF characteristic of spatial frequency of 20/mm of the position of above-mentioned 5 ray casts to the sensitive surface 21H among Figure 20 (a).5 MTF curve M th30 of record represent the variation of value of MTF characteristic of spatial frequency of 30/mm of position same as described above among Figure 20 (b), 5 MTF curve M th40 of record also represent the variation of value of MTF characteristic of spatial frequency of 40/mm of position same as described above among Figure 20 (c), and 5 MTF curve M th50 of record also represent the variation of value of MTF characteristic of spatial frequency of 50/mm of position same as described above among Figure 20 (d).

The value of the MTF characteristic relevant with the camera system of above-mentioned comparative example, make sensitive surface and imaging lens system near the time, namely, relate to the approximately scope of from 0 to 120 μ m for the value of defocus amount in Figure 20 (a)～(d), become its value from 0% counter-rotating and produce the state of pseudo-resolution about the MTF characteristic of spatial frequency 30～50Line/mm.Represent to produce the pseudo-scope of differentiating with arrow G ik among the figure.

In addition, with sensitive surface during away from imaging lens system, that is, relate to 280 μ m to the scope of 400 μ m for the value of defocus amount in Figure 20 (a)～(d), become its value from 0% counter-rotating and produce the pseudo-state of differentiating about the MTF characteristic of spatial frequency 30～50Line/mm.Represent to produce the pseudo-scope of differentiating with arrow G ik among the figure.

Here, the value of defocus amount Ud is between 120 μ m and 280 μ m when (scope of the depth of focus), the value of MTF characteristic is for just, and the amplitude of fluctuation of the value of the MTF characteristic of each spatial frequency becomes about 85% (50Line/mm), 90% (40Line/mm), 70% (30Line/mm), 45% (20Line/mm).

As mentioned above, according to the camera system of comparative example, then only in narrow de-focus region (scopes of about 160 μ m), the value of MTF characteristic just becomes, and the variation of the value of MTF characteristic is large.

About the value of the MTF characteristic scope that defocuses (representing with arrow G ik the figure) from 0% counter-rotating, point similarly is the picture of being differentiated by puppet, can not get the effective coverage and relates to the picture that can specifically have optical significance more than 3 pixels.

That is, only in the scope of the photo distance that limits very much, the value of MTF characteristic is being for just, and can make the significant picture of picture formation of the subject that projects on the sensitive surface.In addition, project to the variation of size of the some picture on the sensitive surface larger.

In addition, the camera system of this comparative example is not that to constitute the effective coverage that projects to the some picture on the sensitive surface when the scope of 0～∞ changes photo distance be size more than 3 pixels that relate on this sensitive surface, therefore, the view data that obtains by this camera system does not satisfy the precondition (improving the condition of resolution) that is used for implementing restoration disposal.

Thereby, implement restoration disposal, the effect of the resolution of the image of this subject of expression that can not be improved even project to the view data that the picture of the subject on the sensitive surface 21H obtains to taking camera system by comparative example.

Figure 21 is the figure that the automobile of the mobile unit with camera system has been carried in expression.

As shown in figure 21, the mobile unit 502～504 that possesses camera system of the present invention can be equipped on automobile 501 grades and use.This automobile 501 have for the outer camera of the car of the dead range of the side of taking the codriver's seat side be mobile unit 502, the outer camera of car of dead range that is used for taking the rear side of automobile 1 is that mobile unit 503 and the back side that is installed in introscope and being used for takes that camera is mobile unit 504 in the car of the field range identical with the driver.

Figure 22 is that the portable terminal device that expression has a camera system is the figure of mobile phone.

As shown in the figure, this mobile phone 510 disposes camera system 512 in the housing 511 of mobile phone.

Figure 23 is that the Medical Devices that expression has a camera system are the figure of endoscope apparatus.

As shown in the figure, this endoscope apparatus 520 of observing biological tissue 525 disposes the camera system 522 of the biological tissue 525 of illuminating for illumination light La for shooting at the leading section 521 of endoscope apparatus 520.

Like this, the aforesaid camera head of the present invention that possesses camera system, portable terminal device, mobile unit, and Medical Devices can with from known camera head of past, portable terminal device, mobile unit, and the existing camera system that possesses of Medical Devices easily change.Namely, do not change from known camera head of past, portable terminal device, mobile unit, the plant bulk that reaches Medical Devices or shape etc., the existing camera system that these devices are had is replaced by camera system of the present invention, can consist of camera head, portable terminal device, mobile unit, and the Medical Devices of the present application.

And, in the above-described embodiments, example with various term restriction imaging lens systems is shown, possess successively the 1st set of lenses with positive focal power that consisted of by at least 1 lens, the 2nd set of lenses with negative focal power that consisted of by at least 1 lens, and be positioned at the imaging lens system that the most close lens as side have the 3rd set of lenses of positive focal power by what at least 1 lens consisted of but the employed imaging lens system of camera system of the present invention can adopt from the thing side, do not limit lens number of consisting of each group or shape etc.For example, can consist of each group by the multi-disc lens.

Claims

1. camera system is characterized in that having:

Imaging lens system;

Imaging apparatus has that two-dimentional shape is arranged a plurality of light receiving pixels and the sensitive surface that consists of, takes the 1st view data that the optical image that projects to the subject on the above-mentioned sensitive surface by above-mentioned imaging lens system is exported this subject of expression; And

Signal processing unit, utilize the recovery coefficient corresponding with the state of the some picture of above-mentioned the 1st pictorial data representation to carry out restoration disposal, above-mentioned the 1st view data is implemented to generate above-mentioned restoration disposal with equal the 2nd view data of the 1st view data of exporting from above-mentioned imaging apparatus when the resolution of above-mentioned imaging lens system is high;

Above-mentioned imaging lens system has successively from the thing side: comprise at least 1 lens and have the 1st set of lenses of positive focal power, comprise at least 1 lens and have the 2nd set of lenses of negative focal power, and comprise at least 1 lens and be positioned at the 3rd set of lenses that the most close lens as side have positive focal power;

Above-mentioned imaging lens system and imaging apparatus constitute: for projecting to some picture on the above-mentioned sensitive surface from the optional position of X, Y, Z direction by above-mentioned imaging lens system, also so that the maximum gauge of the effective coverage of this some picture becomes the above size of 3 pixels that relates to above-mentioned light receiving pixel.

2. camera system as claimed in claim 1, it is characterized in that, above-mentioned imaging lens system constitutes: for projecting to the optical image of the subject on the above-mentioned sensitive surface by above-mentioned imaging lens system from the X more than 10 times, the Y of the focal length that leaves this imaging lens system, the optional position of Z direction, also so that the value of the MTF characteristic relevant with this optical image just become.

3. camera system as claimed in claim 1, it is characterized in that, above-mentioned signal processing unit will carry out above-mentioned restoration disposal as least unit by reaching the pixel region that adds up to more than 9 pixels that relates to that consists of more than horizontal 3 pixels more than vertical 3 pixels on the sensitive surface.

4. camera system as claimed in claim 1 is characterized in that, whole minimum pixel zone of effective coverage that above-mentioned signal processing unit will comprise the some picture that projects on the above-mentioned sensitive surface is as least unit and carry out above-mentioned restoration disposal.

5. camera system is characterized in that having:

Imaging lens system;

Imaging apparatus has that two-dimentional shape is arranged a plurality of light receiving pixels and the sensitive surface that consists of, takes the 1st view data that the optical image that projects to the subject on the above-mentioned sensitive surface by above-mentioned imaging lens system is exported this subject of expression;

The coefficient storage unit, when the maximum gauge in the effective coverage that projects to the some picture on the above-mentioned sensitive surface by above-mentioned imaging lens system relates to big or small more than 3 pixels, to by storing from recovery coefficient corresponding to the state of the above-mentioned some picture of the 1st pictorial data representation of above-mentioned imaging apparatus output; And

Signal processing unit, utilize above-mentioned recovery coefficient to above-mentioned the 1st view data implement to generate with when the resolution of above-mentioned imaging lens system is high from the restoration disposal of the 2nd equal view data of the 1st view data of above-mentioned imaging apparatus output;

Above-mentioned signal processing unit will carry out above-mentioned restoration disposal as least unit by reaching the pixel region that adds up to more than 9 pixels that relates to that consists of more than horizontal 3 pixels more than vertical 3 pixels on the above-mentioned sensitive surface;

Above-mentioned imaging lens system has successively from the thing side: comprise at least 1 lens and have the 1st set of lenses of positive focal power, comprise at least 1 lens and have the 2nd set of lenses of negative focal power, and comprise at least 1 lens and be positioned at the 3rd set of lenses that the most close lens as side have positive focal power.

6. camera system as claimed in claim 5 is characterized in that, the recovery coefficient that above-mentioned coefficient storage unit is obtained separately this camera system by each camera system storage.

7. camera system as claimed in claim 5, it is characterized in that, above-mentioned coefficient storage unit storage from the candidate of each recovery coefficient corresponding to each state of the some picture that is divided into a plurality of kinds according to the selected recovery coefficient that goes out of the state of the some picture of above-mentioned the 1st pictorial data representation.

8. camera system as claimed in claim 5, it is characterized in that, above-mentioned coefficient storage unit stores: further carried out the recovery coefficient of having proofreaied and correct of proofreading and correct according to the state of a picture according to the selected recovery coefficient that goes out of the state of this some picture of above-mentioned the 1st pictorial data representation from the candidate of the multiple recovery coefficient corresponding with each state of this some picture that is divided into a plurality of kinds.

9. such as each the described camera system in the claim 5 to 8, it is characterized in that also having the recovery coefficient of obtaining above-mentioned recovery coefficient and being stored in above-mentioned coefficient storage unit and obtain the unit.

10. such as each the described camera system in the claim 1 to 8, it is characterized in that, above-mentioned signal processing unit carries out above-mentioned restoration disposal, so that the size of the effective coverage of the above-mentioned some picture in the image of above-mentioned the 2nd pictorial data representation is less than the size of the effective coverage of the some picture in the image of above-mentioned the 1st pictorial data representation.

11. each the described camera system as in the claim 1 to 8 is characterized in that, the most close lens face as side that is positioned in above-mentioned the 3rd set of lenses has axle outcurve point.

12. each the described camera system as in the claim 1 to 8 is characterized in that, in above-mentioned the 3rd set of lenses be positioned at the most close lens face as side be the central part of this lens face to be concave surface as side and at periphery to the lens face that is convex surface as side.

13. camera system as claimed in claim 11 is characterized in that, the lens face that is positioned at the most close lens as side in above-mentioned the 3rd set of lenses satisfies following conditional (1):

0.5H＜h＜H……(1)，

Wherein,

H is the effective radius of the lens face that is positioned at the most close picture side in the 3rd set of lenses,

H is the distance from axle outcurve point to optical axis of the lens face that is positioned at the most close picture side in the 3rd set of lenses.

14. such as each the described camera system in the claim 1 to 8, it is characterized in that, the lens face of the thing side of the lens that are positioned at the most close picture side in above-mentioned the 3rd set of lenses is to be convex surface and to be the lens face of concave surface at periphery to the thing side to the thing side at the central part of this lens face.

15. each the described camera system as in the claim 1 to 8 is characterized in that above-mentioned imaging lens system is made of 3 einzel lenses.

16. camera system as claimed in claim 15 is characterized in that, the einzel lens of above-mentioned the 1st set of lenses be convex surface towards the meniscus shape of thing side, the einzel lens of above-mentioned the 2nd set of lenses is convex surface towards the meniscus shape of picture side.

17. a camera system is characterized in that having:

Imaging lens system;

Whole minimum pixel zone of effective coverage that above-mentioned signal processing unit will comprise the some picture that projects on the above-mentioned sensitive surface is as least unit and carry out above-mentioned restoration disposal;

18. camera system as claimed in claim 17, it is characterized in that, above-mentioned signal processing unit carries out above-mentioned restoration disposal, so that the size of the effective coverage of the above-mentioned some picture in the image of above-mentioned the 2nd pictorial data representation is less than the size of the effective coverage of the some picture in the image of above-mentioned the 1st pictorial data representation.

19. camera system as claimed in claim 17 is characterized in that, the most close lens face as side that is positioned in above-mentioned the 3rd set of lenses has axle outcurve point.

20. camera system as claimed in claim 17 is characterized in that, in above-mentioned the 3rd set of lenses be positioned at the most close lens face as side be the central part of this lens face to be concave surface as side and at periphery to the lens face that is convex surface as side.

21. camera system as claimed in claim 19 is characterized in that, the lens face that is positioned at the most close lens as side in above-mentioned the 3rd set of lenses satisfies following conditional (1):

0.5H＜h＜H……(1)，

Wherein,

22. camera system as claimed in claim 17 is characterized in that, the lens face of the thing side of the lens that are positioned at the most close picture side in above-mentioned the 3rd set of lenses is to be convex surface and to be the lens face of concave surface at periphery to the thing side to the thing side at the central part of this lens face.

23. such as each described camera system of claim 17, it is characterized in that, above-mentioned imaging lens system is made of 3 einzel lenses.

24. camera system as claimed in claim 23 is characterized in that, the einzel lens of above-mentioned the 1st set of lenses be convex surface towards the meniscus shape of thing side, the einzel lens of above-mentioned the 2nd set of lenses is convex surface towards the meniscus shape of picture side.

25. a camera head is characterized in that, has each the described camera system in the claim 1 to 24.

26. a portable terminal device is characterized in that, has each the described camera system in the claim 1 to 24.

27. a mobile unit is characterized in that, has each the described camera system in the claim 1 to 24.

28. Medical Devices is characterized in that, have each the described camera system in the claim 1 to 24.

29. a camera system is characterized in that having:

Imaging lens system;

The coefficient storage unit, when the maximum gauge in the effective coverage that projects to the some picture on the above-mentioned sensitive surface by above-mentioned imaging lens system relates to big or small more than 3 pixels, stored with by from recovery coefficient corresponding to the state of the above-mentioned some picture of the 1st pictorial data representation of above-mentioned imaging apparatus output; And

30. the manufacture method of a camera system is the manufacture method of the described camera system of claim 29, it is characterized in that,

To put picture by above-mentioned imaging lens system and project on the sensitive surface of above-mentioned imaging apparatus, in above-mentioned coefficient storage unit storage with by recovery coefficient corresponding to the state of the above-mentioned some picture of the 1st pictorial data representation of exporting from above-mentioned imaging apparatus.

31. the manufacture method of camera system as claimed in claim 30 is characterized in that, above-mentioned recovery coefficient is obtained separately this camera system by each camera system.

32. the manufacture method of camera system as claimed in claim 30, it is characterized in that, above-mentioned recovery coefficient is that the state according to the some picture of above-mentioned the 1st pictorial data representation is selected from the candidate of each recovery coefficient corresponding with each state of the some picture that is divided into a plurality of kinds.

33. the manufacture method of camera system as claimed in claim 30, it is characterized in that, above-mentioned recovery coefficient is further to have carried out the recovery coefficient of proofreading and correct according to the state of a picture according to the selected recovery coefficient that goes out of the state of this some picture of above-mentioned the 1st pictorial data representation from the candidate of the multiple recovery coefficient corresponding with each state of this some picture that is divided into a plurality of kinds.