CN105678215A - Imaging module, imaging device and mobile terminal - Google Patents
Imaging module, imaging device and mobile terminal Download PDFInfo
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- CN105678215A CN105678215A CN201511001322.9A CN201511001322A CN105678215A CN 105678215 A CN105678215 A CN 105678215A CN 201511001322 A CN201511001322 A CN 201511001322A CN 105678215 A CN105678215 A CN 105678215A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/161—Detection; Localisation; Normalisation
- G06V40/166—Detection; Localisation; Normalisation using acquisition arrangements
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/02—Bodies
- G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
- G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/147—Details of sensors, e.g. sensor lenses
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Abstract
The invention discloses an imaging module, an imaging device and a mobile terminal. The imaging module comprises an imaging camera lens, at least one optical filter, a switching mechanism and an image acquisition sensor, wherein the imaging camera lens comprises a diaphragm and a plurality of lenses; the at least one optical filter is arranged between the plurality of lenses, and the switching mechanism is connected with the at least one optical filter and is used for switching the at least one optical filter to different optical filtering modes; and the image acquisition sensor is arranged at the rear end of the imaging camera lens. By arranging the optical filter between the plurality of lenses of the imaging camera lens, the optical filter arranged on the switching mechanism can be switched between different optical filtering modes by means of the switching mechanism controlling the optical filter. In addition, the total length of the imaging camera lens is not increased, a light-passing hole before light rays enter the imaging camera lens is smaller than that after the light rays enter the imaging camera lens, and the size of the optical filter can be reduced, so that the size of the optical filter installed in the imaging camera lens is smaller than that of an optical filter installed in front of an imaging camera lens in the prior art.
Description
Technical field
The present invention relates to technical field of biometric identification, particularly relate to imaging modules, imaging device and mobile terminal.
Background technology
Iris identification carries out identification based on the iris in eyes, it it is a kind of high-precision biometrics identification technology, existing iris image acquiring is generally adopted infrared illumination, be equipped with high-resolution photographic head completes, and requires that user has certain fitness in the process carrying out iris image acquiring. And man face image acquiring is generally adopted visible illumination outfit high-resolution camera and can complete, operate relatively easy. The wave-length coverage of the infrared light light source used due to iris image acquiring is 760-960 nanometer (nm), the wave-length coverage of the visible light source that man face image acquiring uses is 400-750 nanometer (nm), iris image acquiring and man face image acquiring carry out under different wave length light lighting condition, therefore adopt iris capturing instrument and each independent equipment of face Acquisition Instrument more.
Image collecting device both being operated in different wavelength range integrates exists certain difficulty, if being integrated on same mobile terminal device by both image collecting devices again, to be also subject to restriction spatially, it is difficult to realize. Two kinds of image collecting devices are integrated two kinds of solutions by prior art: a kind of is adopt special sensor, and processes realization in conjunction with successive image; Another kind is by adopting two optical filter switchings, being positioned over by optical filter between front end or camera lens and the image acquiring sensor of camera lens, reaches iris image acquiring and the purpose of man face image acquiring switching by controlling optical filter switching. Optical filter is generally arranged on the front end of camera lens, as it is shown in figure 1,001 be wherein imaging lens, 003 is optical filter, and imaging lens 001 includes multi-disc lens 002, is provided with diaphragm 005 in imaging lens 001. It is finally be additionally provided with image acquiring sensor 006 at imaging lens 001 rear.And multiple optical filters is typically required for different wavelength range, and on often a piece of, there is a kind of rete, front end or rear end that optical filter is arranged on imaging lens all can increase the length that imaging lens is overall. Meanwhile, referring to Fig. 1, in order to make optical filter 003 can cover the whole angle of visual field of imaging lens 001, the size of optical filter 003 is it is generally required to be more than or equal to the size of first lens in imaging lens 001.
Accordingly, it would be desirable to a kind of new iris image acquiring and man face image acquiring imaging device.
Summary of the invention
For problems of the prior art, the purpose of the present invention is for providing a kind of imaging modules, imaging device and mobile terminal, to solve, in prior art, iris image acquiring and man face image acquiring are integrated in a bigger technical problem of equipment upper volume.
For achieving the above object, the present invention adopts the following technical scheme that
According to an aspect of the invention, it is provided a kind of imaging modules, including imaging lens, at least one tablet filter, switching mechanism and image acquiring sensor, imaging lens includes diaphragm and multi-disc lens; At least one tablet filter is arranged between described multi-disc lens; Described switching mechanism is connected with described at least one tablet filter, for making described at least one tablet filter switch to different optical filtering patterns; Described image acquiring sensor is arranged on the rear end of described imaging lens.
According to an embodiment of the present invention, described at least one tablet filter only includes a tablet filter, and a described tablet filter has at least two rete being suitable to different wavelength range.
According to another embodiment of the present invention, a described tablet filter includes: a base material and cover the described at least two rete of described base material zones of different.
According to another embodiment of the present invention, the thickness of described at least one tablet filter is 0.3-1.1mm.
According to another embodiment of the present invention, described at least one tablet filter is disposed adjacent with described diaphragm.
According to another embodiment of the present invention, described optical filtering pattern includes infrared filtering pattern and visible ray optical filtering pattern.
According to another embodiment of the present invention, described switching mechanism includes:
Rotating mechanism, the fixed described optical filter in inner side, outside has teeth portion; And
Driving mechanism, has engaging piece, and described engaging piece is meshed with described teeth portion, to drive described rotating mechanism to rotate.
According to another aspect of the present invention, additionally provide a kind of imaging device, including above-mentioned imaging modules and control module, described control module is for controlling described switching mechanism according to image capture instruction, so that described at least one tablet filter switches to different optical filtering patterns;
Described image capture instruction is for collection iris image instruction or gathers facial image instruction,
When receiving collection iris image instruction, described control module controls described switching mechanism so that described at least one tablet filter switches to infrared filtering pattern;
When receiving collection facial image instruction, described control module controls described switching mechanism so that described at least one tablet filter switches to visible ray optical filtering pattern.
According to another aspect of the invention, a kind of mobile terminal is additionally provided, including above-described imaging device, infrared illumination light source and visible illumination light source.
According to another embodiment of the present invention, described mobile terminal also includes:
Light source handover module, is connected with described infrared illumination light source and described visible illumination light source, for controlling the switching of light source according to described image capture instruction;
When receiving collection iris image instruction, described light source handover module controls described infrared illumination light source and opens;
When receiving collection facial image instruction, described light source handover module controls described visible illumination light source and opens.
As shown from the above technical solution, the method have technical effect that: compared with the mode in prior art, optical filter being arranged between imaging lens front end or imaging lens with image acquiring sensor, the present invention by being arranged between the multi-disc lens of imaging lens by optical filter, it is possible to makes the optical filter being arranged on switching mechanism switch under different optical filtering patterns by controlling the switching mechanism of optical filter. Owing to optical filter is arranged in imaging lens, do not increase the length that imaging lens is overall, due also to light hole reduces to some extent before light relatively enters imaging lens after entering imaging lens, so can reduce the size of optical filter so that be arranged in imaging lens and also reduce to some extent in size than the optical filter before prior art is arranged on imaging lens.
Accompanying drawing explanation
Considering following the following detailed description of the embodiment of the present invention in conjunction with the drawings, the various targets of the present invention, feature and advantage will become apparent from. Accompanying drawing is only the exemplary diagram of the present invention, is not necessarily drawn to scale. In the accompanying drawings, same accompanying drawing labelling represents same or similar parts all the time.
Fig. 1 is the structural representation of imaging modules in prior art.
The composition schematic diagram of the Fig. 2 a kind of imaging modules for providing in the embodiment of the present invention one.
Fig. 3 is the schematic diagram of optical filter in the embodiment of the present invention one.
The structural scheme of mechanism of the Fig. 4 switching mechanism for switching optical filter for providing in the embodiment of the present invention one.
A kind of structural representation of the Fig. 5 a kind of imaging modules for providing in the embodiment of the present invention one.
The another kind of structural representation of the Fig. 6 a kind of imaging modules for providing in the embodiment of the present invention one.
The composition schematic diagram of the Fig. 7 a kind of imaging device for providing in the embodiment of the present invention two.
The composition schematic diagram of the Fig. 8 a kind of mobile terminal for providing in the embodiment of the present invention three.
Fig. 9 is the embodiment of the present invention three mid-infrared light lighting source and visible illumination light source and imaging modules position relationship schematic diagram on mobile terminals.
Figure 10 is the mobile terminal of the offer operation principle schematic diagram when providing light source in the embodiment of the present invention three.
Description of reference numerals is as follows:
001: imaging lens;
002: lens;
003: optical filter;
0031: infrared fileter;
0032: visible filter;
004: switching mechanism;
0041: rotating mechanism;
00411: the tooth of arc-shaped rack;
0042: driving mechanism;
00421: motor;
00422: linear gear rack;
004221: the tooth of linear gear rack;
005: diaphragm;
006: image acquiring sensor;
10: imaging modules;
11: control module;
12: processing unit;
100: imaging device;
110: infrared illumination light source;
120: visible illumination light source;
130: light source handover module;
200: mobile terminal.
Detailed description of the invention
The exemplary embodiments embodying feature of present invention and advantage will describe in the following description in detail. It should be understood that the present invention can have various changes in different embodiments, it neither departs from the scope of the present invention, and explanation therein and accompanying drawing are inherently the use being illustrated as, and is not used to the restriction present invention.
Feature described in the invention, structure or characteristic can be combined in one or more embodiment in any suitable manner. In the following description, it is provided that many details are thus providing fully understanding embodiments of the present invention. It will be appreciated, however, by one skilled in the art that one or more without in described specific detail of technical scheme can be put into practice, or other method, assembly, material etc. can be adopted. In other cases, known features, material or operation are not shown in detail or describe to avoid fuzzy each aspect of the present invention.
Exemplarily provide some embodiments of the present invention below with reference to accompanying drawings. Should be appreciated that the embodiment of reference does not limit the scope of the invention. It is to say, any example enumerated in this specification is not restrictive, but merely exemplary.
In view of defect existing in prior art, in the urgent need to designing a kind of imaging modules iris image acquiring and man face image acquiring dual channel mode can being integrated in one and device.
Embodiment one
Referring to Fig. 2, the present embodiment provides a kind of imaging modules 10, including imaging lens 001, at least one optical filter 003, switching mechanism 004 and image acquiring sensor 006. Imaging lens 001 includes diaphragm 005 and multi-disc lens 002, and at least one optical filter 003 is arranged between multi-disc lens 002. Switching mechanism 004 is connected with at least one optical filter 003, for making at least one tablet filter 003 switch to different optical filtering patterns. Image acquiring sensor 006 is arranged on the rear end of imaging lens 001, is used for collecting iris image or facial image. At least one tablet filter 003 can only include a tablet filter, optical filter 003 include base material and cover base material zones of different, there is at least two rete suitable in different wavelength range. Imaging modules in the present embodiment is for compatible iris image acquiring and man face image acquiring, accordingly, optical filter 003 has the rete suitable in infrared light (wave-length coverage 760nm～960nm) and visible ray (wave-length coverage 400nm～750nm) two wave-length coverages. Two kinds of retes on a tablet filter can also be made in certain embodiments to be respectively suitable for specific narrow bandwidth range or broadband range, such as it is applicable to the narrow bandwidth range of infrared light wavelength at 800nm～900nm, the narrow bandwidth range of visible wavelength, can also according to using the scope needing arrowband or the broadband selecting other in other embodiment at 500nm～600nm.
The schematic diagram of optical filter 003 is as shown in Figure 3, base material therein is usually glass baseplate, it is respectively coated with different retes in two different panel region, make a tablet filter 003 include infrared fileter 0031 and visible filter 0032 two parts simultaneously, controlled infrared fileter 0031 and the switching of visible filter 0032 by switching mechanism 004, make optical filter 003 can be respectively used to iris image acquiring and man face image acquiring under different optical filtering patterns. One tablet filter has two kinds of retes suitable in different-waveband, accordingly, two kinds of optical filtering patterns respectively infrared filtering pattern that imaging modules has and visible ray optical filtering pattern.
Optical filter 003 of the prior art is to be plated on two panels glass baseplate respectively by the rete suitable in different wavelength range; And the optical filter 003 used when iris image acquiring and man face image acquiring in the present embodiment is two kinds of retes of plating on same sheet glass base material, be specifically glass baseplate zones of different plate two kinds of retes (if Fig. 3 half is infrared fileter, second half is visible filter), both retes do not interfere with each other, and make imaging modules have different optical filtering patterns by two kinds of retes of switching corresponding to effective working region in use.
It should be noted that, at least one tablet filter 003 is except only comprising a tablet filter, on this optical filter, zones of different covers beyond the mode of the filter membranous layer being applicable to different wavelength range, multiple optical filters 003 can also be included in other embodiments of the invention, it is respectively used to different wave-length coverages, multiple optical filters 003 is also provided between the multi-disc lens of imaging lens, and be also required to switching mechanism 004 and control the switching of different optical filter, so that imaging modules is operated under different optical filtering patterns.
Switching mechanism 004 in the present embodiment can control to be applicable to the switching of the rete of different wavelength range, so that imaging modules is operated under different optical filtering patterns. This switching mechanism 004 can be not only used for the switching of zones of different on same optical filter, it is also possible to for the switching to multi-disc difference optical filter.
Fig. 4 is the structural scheme of mechanism of the switching mechanism for switching optical filter according to an illustrative embodiments.
As shown in Figure 4, including optical filter 003 and switching mechanism 004, wherein switching mechanism 004 includes: rotating mechanism 0041 and driving mechanism 0042. Fixed optical filter 003 inside rotating mechanism 0041, outside has teeth portion; Driving mechanism 0042 has engaging piece, and engaging piece is meshed with the teeth portion of rotating mechanism 0041, to drive rotating mechanism 0041 to rotate. Optical filter 003 is illustrated in embodiment before, does not repeat them here. Hereinafter will focus on the structure introducing rotating mechanism 0041 and driving mechanism 0042.
In the present embodiment, the teeth portion of rotating mechanism 0041 can be arc-shaped rack, the radian of the arcuate side surface of the radian of the inner side curved surfaces of arc-shaped rack and semicircle optical filter 003 matches, such as, when being shaped as semicircle of optical filter 003, the central angle of arc-shaped rack is 180 degree, it is possible to make the semicircle arcuate side surface of optical filter 003 fit completely with the inner side curved surfaces of arc-shaped rack. The optical filter 003 fixed form inside arc-shaped rack can be adhesively fixed by adhesive glue, or arranges the draw-in groove that the thickness with optical filter 003 matches inside arc-shaped rack, and optical filter 003 snap-fit to be fixed by draw-in groove, the present invention is not limited thereto. The outer arcuate surface of arc-shaped rack has multiple teeth 00411 of arcuately surface arrangement, and is engaged with driving mechanism 0042 by tooth 00411.
In the present embodiment, driving mechanism 0042 includes motor 00421 and engaging piece, and motor 00421 can be micromachine or magnetic-type motor, and engaging piece can be linear gear rack 00422. The output shaft of motor 00421 is connected with one end of linear gear rack 00422, under the driving of motor 00421, linear gear rack 00422 can move along the direction of the arrow in Figure, the upper surface of linear gear rack 00422 arranges multiple tooth 004221 linearly arranged, the tooth 004221 of linear gear rack 00422 engages with the tooth 00411 of rotating mechanism 0041, make rotating mechanism 0041 rotate under the drive of driving mechanism 0042, and fixing optical filter 003 is thus rotated in mechanism 0041 rotates. Such as, linear gear rack 00422 is when under the driving of motor 00421, along figure, arrow right direction is moved, mechanism 0041 can be rotated turn clockwise, so that the visible filter 0032 in optical filter 003 is positioned at position, optical center, now can carry out the collection of facial image. Otherwise, linear gear rack 00422 is when under the driving of motor 00421, along figure, arrow left direction moves, mechanism 0041 can be rotated rotate counterclockwise, so that the infrared fileter 0031 in optical filter 003 is positioned at position, optical center, now can carry out the collection of iris image.
In the present embodiment, the material of arc-shaped rack can adopt metal material, plastics or acrylic etc.; for preventing optical filter 003 and arc-shaped rack from damaging due to rigid contact; flexible cover sheet can be set between the inner side arcwall face of arc-shaped rack and optical filter 003, for instance rubber blanket etc. Additionally, rotating mechanism 0041 is except including arc-shaped rack, it is also possible to including the loading plate (not shown) for carrying optical filter 003, loading plate is fixed on the inner side of arc-shaped rack, so can be equipped on loading plate by optical filter 003.
In the present embodiment, the driving section between driving mechanism 0042 and rotating mechanism 0041 adopts linear gear rack, but the present invention is not limited thereto, and it can also replace with worm screw or gear. When substituting with gear, make the gear of driving mechanism and the indented joint of rotating mechanism 0041, rotated by motor-driven gear, then drive arc-shaped rack to rotate the switching action realizing optical filter.
The thickness of the optical filter 003 in the present embodiment is only 0.3-1.1mm, and it is placed in imaging lens 001, optical filter 003 is arranged on the mode of imaging lens 001 front end by prior art of comparing, a tablet filter is only needed by the rete in imaging lens 001, the light of different wavelength range filtered, the rete being compared in prior art the light of different filter ranges is filtered is formed on two tablet filters, the present embodiment can reduce the thickness of optical filter, optical filter is arranged between lens simultaneously, entire length relatively prior art reduces to some extent, thus reducing the space shared by imaging modules, make this imaging modules be especially suitable for be applied in should meet iris image acquiring and man face image acquiring in one, on the equipment that space size is restricted again simultaneously.
But the structural representation of the imaging modules that the present embodiment provides is as it is shown in figure 5, comprise 4 lens be not limited thereto in imaging lens 001, the number of lens is more than 2 in other embodiments of the invention.
In the present embodiment, optical filter is arranged between multi-disc lens, it is possible to optical filter is arranged on diaphragm 005 place, as shown in Figure 5; Can also being disposed at the position beyond diaphragm 005 place, as shown in Figure 6, what can select optical filter 003 in actual applications as required arranges position.
When optical filter is arranged on diaphragm 005 place, can be such as that optical filter 003 is disposed adjacent with diaphragm 005, make light hole corresponding with the position of optical filter, and the distance between radiation direction upper filter 003 and diaphragm 005 is changeable, and be not specifically limited. Design principle according to optical lens, to optical filter 003 is arranged on diaphragm 005 place, owing to the position of diaphragm 005 is exactly the position that in the middle of battery of lens, clear aperature is minimum, being sized at of therefore required optical filter 003 is minimum. Except optical filter 003 is arranged on diaphragm 005 place, optical filter 003 can also be arranged on other positions, as shown in Figure 6, diaphragm 005 is between second lens and the 3rd lens, and optical filter 003 is arranged on the rear end of diaphragm 005, namely between the 3rd lens and the 4th lens. Although now the size of optical filter is not minimum, but the size of the optical filter needed for optical filter is arranged on the front end of imaging lens compared to prior art is also greatly reduced. Optical filter 003 can also be arranged on the front end of diaphragm 005 in other embodiments, and namely between first lens and second lens, structure and principle, with that optical filter is arranged on diaphragm place, diaphragm rear end is similar, repeat no more herein.
No matter optical filter 003 is arranged on diaphragm place, diaphragm front end or diaphragm rear end, all switching mechanism 004 is arranged on position corresponding with optical filter 003. Switching mechanism 004 is connected with optical filter 003, for the different retes of the corresponding light hole of optical filter 003 are switched over, to realize different optical filtering pattern, such as by controlling switching mechanism 004, when the corresponding light hole of the infrared fileter 0031 in the optical filter shown in Fig. 3, optical filtering module is operated under infrared filtering pattern; And when the corresponding light hole of the visible filter 0032 in the optical filter shown in Fig. 3, optical filtering module is operated under visible ray optical filtering pattern. It should be noted that, in Fig. 5 and Fig. 6, diaphragm 005 is arranged between second lens and the 3rd lens merely illustrative, do not limit the position of diaphragm 005 with this, the diaphragm 005 position in imaging lens 001 can also be adjusted as required, for instance can also is arranged on by diaphragm 005 between first lens and second lens; Or diaphragm 005 can also be arranged between the 3rd lens and the 4th lens.
Also, it should be noted " the first lens " described in the present embodiment, " second lens ", " the 3rd lens " and " the 4th lens " are all be first, second, third and fourth sheet lens successively from left-hand digit with lens shown in Fig. 5 and Fig. 6.
For obtaining high-quality iris image and facial image, imaging lens more than 001 adopts high-resolution camera lens, and the lens design many employings aspheric design in imaging lens 001, therefore in the present embodiment, multi-disc lens are non-spherical lens.
Except above-mentioned imaging lens 001, at least one optical filter 003, switching mechanism 004 and image acquiring sensor 006, imaging modules 10 also includes lens barrel, objective carrier and circuit board (not shown), and by objective carrier, imaging lens is fixed on circuit boards. It addition, image acquiring sensor 006 for gathering iris image under infrared filtering pattern, under visible ray optical filtering pattern, gather facial image. Image acquiring sensor 006 in the present embodiment can be CCD (Charge-coupledDevice, charge coupled cell) imageing sensor, it can also be CMOS (ComplementaryMetalOxideSemiconductor, complementary metal oxide semiconductors (CMOS)) imageing sensor.
Based on above-mentioned, the present embodiment have the technical effect that compared with the mode in prior art, optical filter being arranged between imaging lens front end or imaging lens with image acquiring sensor, optical filter and switching mechanism can be placed in imaging lens by the present invention, under the premise not increasing the overall length of imaging lens, make to have concurrently the volume miniaturization as much as possible of the imaging modules of iris image acquiring and man face image acquiring dual channel mode, it is possible to be applied in the equipment of more limited space.
Additionally, due also to light hole reduces to some extent before light relatively enters imaging lens after entering imaging lens, so can reduce the size of optical filter so that be arranged in imaging lens and also reduce to some extent in size than the optical filter before prior art is arranged on imaging lens.
Embodiment two
Based on above-described embodiment one, the present embodiment additionally provides a kind of imaging device, composition schematic diagram is as shown in Figure 7, except including the imaging modules 10 in above-described embodiment one, can also include controlling module 11 and processing unit 12, for controlling switching mechanism 004 according to image capture instruction, so that at least one tablet filter switches to different optical filtering patterns.Shown in Figure 7, imaging device controls module 11 be connected with switching mechanism 004 in imaging modules 10, for receiving image capture instruction and passing to switching mechanism 004, switching mechanism 004 controls the switching of optical filter 003 according to image capture instruction, so that imaging device is operated under different optical filtering patterns.
Image capture instruction includes two kinds, and one is to gather iris image order, and another kind is to gather facial image order. When receiving collection iris image order, control module 11 and control switching mechanism 004 so that optical filter switches to infrared filtering tablet mode; When receiving collection facial image order, control module 11 and control switching mechanism 004 so that optical filter switches to visible filter pattern.
Except above-mentioned, after image acquiring sensor 006 collects iris or facial image in imaging modules 10, image transmitting is carried out process and the comparison of image, thus being identified result to processing unit 12. In order to save space, the circuit board in imaging modules can also integrate according to subject boards comprised in the equipment that imaging device is applied. Imaging device can also increase as required miscellaneous part or module (such as power supply etc.) are set, be omitted herein, do not describe in detail one by one.
Based on above-mentioned, having the technical effect that of the present embodiment sends image capture instruction by control module to the switching mechanism in imaging modules, thus making imaging modules be operated under different optical filtering patterns according to image capture instruction. Compared with the mode in prior art, optical filter being arranged between imaging lens front end or imaging lens with image acquiring sensor, optical filter and switching mechanism can be placed in imaging lens by the imaging modules of the present embodiment, under the premise not increasing the overall length of imaging lens, make to have concurrently the volume miniaturization as much as possible of the imaging modules of iris image acquiring and man face image acquiring dual channel mode, so that the volume of imaging device is less, it is possible to be applied in the equipment of more limited space.
Additionally, due also to light hole reduces to some extent before light relatively enters imaging lens after entering imaging lens, so can reduce the size of optical filter, make to be arranged in imaging lens than prior art be arranged on imaging lens before optical filter also reduce to some extent in size, save imaging device manufacturing cost.
Embodiment three
The present embodiment additionally provides a kind of mobile terminal 200, and referring to Fig. 8, this mobile terminal includes the imaging device 100 in embodiment two. Except imaging device 100, mobile terminal can also include the light source that imaging device work is required, for instance can include infrared illumination light source 110, visible illumination light source 120 and light source handover module 130.
Infrared illumination light source 110 is opened for being switched under iris capturing pattern at imaging device, it is provided that infrared light, and the wave-length coverage of infrared illumination light source 110 is 760nm-960nm; Visible illumination light source 120 is opened for being switched under face drainage pattern at imaging device, it is provided that visible ray, it is seen that the wave-length coverage of optical illumination light source is 400nm-750nm.
Infrared illumination light source 110 and visible illumination light source 120 are with the imaging modules 10 position relationship on mobile terminal 200 as shown in Figure 8, it is mobile phone for mobile terminal, imaging modules 10, infrared illumination light source 110 and visible illumination light source 120 can be arranged on the upside of mobile phone display screen.But merely illustrative in Fig. 9, be not limited thereto, it is possible to according to actual needs and the available space of mobile terminal 200 organize the position of infrared illumination light source 110 and visible illumination light source 120 to arrange. Such as, if imaging modules is provided in the front-facing camera on mobile phone, then infrared illumination light source and visible illumination light source are also disposed at the front side of mobile phone, concrete distribution can be simultaneously located at the side of imaging modules, such as Fig. 9, it is also possible to be separately positioned on the both sides (not shown) of imaging modules. And if imaging modules is provided in the post-positioned pick-up head on mobile phone, then infrared illumination light source and visible illumination light source are also disposed at the rear side of mobile phone, and can using flash lamp rearmounted for existing mobile phone as visible illumination light source, and concrete distribution is as above-mentioned. Additionally, distance between infrared illumination light source and visible illumination light source and imaging modules can adjust according to the size of the equipment applied, such as large scale and undersized equipment, distance between infrared illumination light source and visible illumination light source and imaging modules is also not of uniform size, distance range is substantially between 15mm～50mm, for the equipment beyond stock size it is also possible to beyond above-mentioned distance range.
What provide in the present embodiment has iris image acquiring and the man face image acquiring function mobile terminal in one when providing infrared illumination light source 110 or operation principle schematic diagram is as shown in Figure 10 when visible illumination light source 120. Under infrared filtering pattern, the direction main devices along opticpath is followed successively by: infrared illumination light source 110, imaging lens 001 (lens, the infrared light optical filter of optical filter 003, lens) and image acquiring sensor 006; Under visible ray optical filtering pattern, the direction main devices along opticpath is followed successively by: visible illumination light source 120, imaging lens 001 (lens, the visible filter of optical filter 003, lens) and image acquiring sensor 006.
Mobile terminal 200 also includes light source handover module 130, it is connected with infrared illumination light source 110 and visible illumination light source 120, for controlling the switching of light source according to image capture instruction, when receiving collection iris image instruction, light source handover module 130 controls infrared illumination light source 110 and opens, imaging device switches to infrared filtering pattern, carries out iris image acquiring; When receiving collection facial image instruction, light source handover module 130 controls visible illumination light source 120 and opens, and imaging device switches to visible ray optical filtering pattern, carries out man face image acquiring. Generally, after iris image acquiring or man face image acquiring complete, the light source of unlatching can be automatically switched off; Or it is automatically switched off light source after completing image comparison under the application scenarios such as authentication again.
Based on above-mentioned, the present embodiment have the technical effect that according to using the unlatching needing to control infrared illumination source and visible illumination light source on mobile terminal, imaging device is made to be operated in infrared filtering pattern when infrared illumination source is opened, switching mechanism controls infrared fileter correspondence light hole, thus the people before mobile terminal is carried out iris image acquiring; Be operated in visible ray optical filtering pattern when visible illumination light source is opened, switching mechanism controls visible filter correspondence light hole, thus the people before mobile terminal is carried out man face image acquiring. By optical filter and switching mechanism are placed in imaging lens, under the premise not increasing the overall length of imaging lens, mobile terminal can realize iris image acquiring and man face image acquiring is double mode in one, control mobile terminal by switching mechanism and be operated under different optical filtering patterns, meet user's request widely.
It should be appreciated that the present invention is not limited in its application to detailed construction and the arrangement of parts in this paper. The present invention can have other embodiments, and can realize in many ways and perform. Aforesaid deformation form and modification fall within the scope of the present invention. Mention or all alternative combination of obvious two or more independent features it should be appreciated that invention disclosed and defined herein extends to text and/or drawings. All these different combinations constitute the multiple alternative aspect of the present invention. Embodiment as herein described describes the best mode becoming known for realizing the present invention, and those skilled in the art will be enable to utilize the present invention.
Claims (10)
1. an imaging modules, it is characterised in that including:
Imaging lens, including diaphragm and multi-disc lens;
At least one tablet filter, is arranged between described multi-disc lens;
Switching mechanism, is connected with described at least one tablet filter, for making described at least one tablet filter switch to different optical filtering patterns; And
Image acquiring sensor, is arranged on the rear end of described imaging lens.
2. imaging modules according to claim 1, it is characterised in that described at least one tablet filter only includes a tablet filter, and a described tablet filter has at least two rete being suitable to different wavelength range.
3. imaging modules according to claim 2, it is characterised in that a described tablet filter includes:
One base material; And
Cover the described at least two rete of described base material zones of different.
4. imaging modules according to claim 1, it is characterised in that the thickness of described at least one tablet filter is 0.3-1.1mm.
5. imaging modules according to claim 1, it is characterised in that described at least one tablet filter is disposed adjacent with described diaphragm.
6. imaging modules according to claim 1, it is characterised in that described optical filtering pattern includes infrared filtering pattern and visible ray optical filtering pattern.
7. imaging modules according to claim 1, it is characterised in that described switching mechanism includes:
Rotating mechanism, the fixed described optical filter in inner side, outside has teeth portion; And
Driving mechanism, has engaging piece, and described engaging piece is meshed with described teeth portion, to drive described rotating mechanism to rotate.
8. an imaging device, it is characterised in that including:
Imaging modules as according to any one of claim 1-7; And
Control module, for controlling described switching mechanism according to image capture instruction, so that described at least one tablet filter switches to different optical filtering patterns;
Described image capture instruction is for gathering iris image instruction or gathering facial image instruction;
When receiving collection iris image instruction, described control module controls described switching mechanism so that described at least one tablet filter switches to infrared filtering pattern;
When receiving collection facial image instruction, described control module controls described switching mechanism so that described at least one tablet filter switches to visible ray optical filtering pattern.
9. a mobile terminal, it is characterised in that including:
Imaging device as claimed in claim 8;
Infrared illumination light source; And
Visible illumination light source.
10. mobile terminal according to claim 9, it is characterised in that described mobile terminal also includes:
Light source handover module, is connected with described infrared illumination light source and described visible illumination light source, for controlling the switching of light source according to described image capture instruction;
When receiving collection iris image instruction, described light source handover module controls described infrared illumination light source and opens;
When receiving collection facial image instruction, described light source handover module controls described visible illumination light source and opens.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511001322.9A CN105678215A (en) | 2015-12-28 | 2015-12-28 | Imaging module, imaging device and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511001322.9A CN105678215A (en) | 2015-12-28 | 2015-12-28 | Imaging module, imaging device and mobile terminal |
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| CN105678215A true CN105678215A (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201511001322.9A Pending CN105678215A (en) | 2015-12-28 | 2015-12-28 | Imaging module, imaging device and mobile terminal |
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