CN108363190A - A kind of lens system and camera lens - Google Patents
A kind of lens system and camera lens Download PDFInfo
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- CN108363190A CN108363190A CN201810162226.XA CN201810162226A CN108363190A CN 108363190 A CN108363190 A CN 108363190A CN 201810162226 A CN201810162226 A CN 201810162226A CN 108363190 A CN108363190 A CN 108363190A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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Abstract
The present invention provides a kind of lens system and camera lens, it be positive the first lens group and focal power is positive the second lens group which along optical axis is equipped with focal power successively from the object side to image side；First lens group includes successively from the object side to image side along optical axis：Focal power is negative the first lens, focal power is negative the second lens, focal power is positive the first sub-lens group, focal power is positive the third lens；Wherein, the first sub-lens group includes at least one meniscus lens convex surface facing image side；Second lens group includes successively from the object side to image side along optical axis：Focal power is negative the second sub-lens group, focal power is positive third sub-lens group, focal power is positive the 4th lens, focal power is positive the 4th sub-lens group；Wherein, the 4th lens are biconvex lens, in the program, under the structure of each lens and lens group, focal power, the cooperation that puts in order, can realize the camera lens of starlight grade large aperture under conditions of meeting big target surface, high-resolution.
Description
Technical field
The present invention relates to optical instrument field, more particularly to a kind of lens system and camera lens.
Background technology
In safety-security area, web camera is the commonly used equipment in safety-protection system, and camera lens is the main of web camera
Composition part, lens performance directly affect image quality and visual field, are constantly carried with the technical indicator demand of safety-protection system
Height begins to use the image-forming component of big target surface to enhance image quality on video camera, but this requires lens imaging areas also to need
It wants to be adapted with big target surface image-forming component, when lens imaging area increases, the spherical aberration of camera lens, coma, chief ray is emitted
Angle (CRA), higher requirements are also raised for chromatic aberration correction ability.
Currently, existing camera lens is in the condition for meeting big target surface, high-resolution (highest supports 8,000,000 pixel camera machines)
Under, aperture is usually smaller (general aperture (F/#) is 2.0 or so), and small aperture can make camera lens cannot be clear in dim light
Imaging.
Based on this, research and development are a in the condition for meeting big target surface, high-resolution (highest supports 8,000,000 pixel camera machines)
Under, the camera lens of starlight grade large aperture, which may be implemented, just seems necessary.
Invention content
An embodiment of the present invention provides a kind of lens system and camera lenses, to meet big target surface, high-resolution (highest
Support 8,000,000 pixel camera machines) under conditions of, realize the camera lens of starlight grade large aperture.
A kind of lens system provided in an embodiment of the present invention, it is positive to be equipped with focal power successively from the object side to image side along optical axis
First lens group and focal power are the second positive lens group；
First lens group includes successively from the object side to image side along optical axis：Focal power is the first lens born, focal power
It is positive the first sub-lens group for the second negative lens, focal power, focal power is positive the third lens；Wherein, first son
Lens group includes at least one meniscus lens convex surface facing image side；
Second lens group includes successively from the object side to image side along optical axis：Focal power is the second sub-lens group born, light
Focal power is positive third sub-lens group, focal power is positive the 4th lens, focal power is positive the 4th sub-lens group；Wherein, institute
It is biconvex lens to state the 4th lens.
Preferably, the first sub-lens group and the third lens meet condition：3<f3/f<4.5,1.8<f4/f<
2.8；Wherein, f3Indicate the focal length of the first sub-lens group, f4Indicate that the focal length of the third lens, f indicate the lens system
The focal length of system.
Preferably, the refractive index of the glass material of lens and the third lens in the first sub-lens group is all higher than
1.8。
Preferably, at least there are four the Abbe numbers of the glass material of lens to be more than 65 in second lens group.
Preferably, the second sub-lens group includes successively from the object side to image side along optical axis：Focal power is the positive the 5th saturating
Mirror and focal power are the 6th lens born；Wherein, the 5th lens are biconvex lens, and the 6th lens are biconcave lens；
Or
5th lens and the 6th lens are the meniscus lens convex surface facing object side.
Preferably, the third sub-lens group includes at least two lens.
Preferably, the third sub-lens group includes successively from the object side to image side along optical axis：7th lens and the 8th lens；
Wherein, it is just and convex surface facing the meniscus lens of image side that the 7th lens, which are focal power, and the 8th lens strength is negative
And convex surface facing the meniscus lens of image side；Or
It is negative biconcave lens that 7th lens, which are focal power, and the 8th lens are that focal power is positive lenticular
Mirror.
Preferably, the third sub-lens group includes successively from the object side to image side along optical axis：7th lens, the 8th lens and
9th lens；Wherein, it is positive biconvex lens that the 7th lens, which are focal power, and the 8th lens are that focal power is negative double
Concavees lens, the 9th lens are that focal power is positive biconvex lens.
Preferably, the 4th sub-lens group includes at least the meniscus lens convex surface facing object side.
Preferably, it is just and convex surface facing the meniscus lens of object side that the 4th sub-lens group, which includes focal power,；Or
The 4th sub-lens group includes successively from the object side to image side along optical axis：Focal power is negative and convex surface facing object side
Meniscus lens and focal power are positive biconvex lens.
Preferably, the first sub-lens group includes at least one meniscus lens convex surface facing image side.
Preferably, second lens are biconcave lens or the meniscus lens convex surface facing image side.
Preferably, the third lens be towards image side surface be plane planoconvex spotlight or biconvex lens.
The embodiment of the present invention additionally provides a kind of camera lens, includes successively from the object side to image side along optical axis：The present invention is arbitrarily real
The lens system and imaging surface of example offer are provided.
Preferably, the camera lens further includes：The optical filter being set between the lens system and the imaging surface.
The embodiment of the present invention has the beneficial effect that：
In lens system provided in an embodiment of the present invention and camera lens, in the structure of each lens and lens group, focal power, arrangement
Under the cooperation of sequence, it can be realized under conditions of meeting big target surface, high-resolution (highest supports 8,000,000 pixel camera machines)
The camera lens of starlight grade large aperture.
Description of the drawings
Fig. 1 (a) is the structural schematic diagram of the first lens system provided in an embodiment of the present invention；
Fig. 1 (b) is the structural schematic diagram of second of lens system provided in an embodiment of the present invention；
Fig. 1 (c) is the structural schematic diagram of the third lens system provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the first camera lens provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of second of camera lens provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the third camera lens provided in an embodiment of the present invention；
Fig. 5 is optical transfer function (MTF) curve graph for the camera lens visible light part that the embodiment of the present invention four provides；
Fig. 6 is optical transfer function (MTF) curve graph for the camera lens visible light part that the embodiment of the present invention five provides；
Fig. 7 is optical transfer function (MTF) curve graph for the camera lens visible light part that the embodiment of the present invention six provides.
Specific implementation mode
An embodiment of the present invention provides a kind of lens system and camera lenses, to meet big target surface, high-resolution (highest
Support 8,000,000 pixel camera machines) under conditions of, realize the camera lens of starlight grade large aperture.
A kind of lens system provided in an embodiment of the present invention, it is positive to be equipped with focal power successively from the object side to image side along optical axis
First lens group and focal power are the second positive lens group；
First lens group includes successively from the object side to image side along optical axis：Focal power is the first lens born, focal power
It is positive the first sub-lens group for the second negative lens, focal power, focal power is positive the third lens；Wherein, described first thoroughly
Mirror is the meniscus lens convex surface facing object side or the plano-concave lens that the surface towards object side is plane；
Second lens group includes successively from the object side to image side along optical axis：Focal power is the second sub-lens group born, light
Focal power is positive third sub-lens group, focal power is positive the 4th lens, focal power is positive the 4th sub-lens group；Wherein, institute
It is biconvex lens to state the 4th lens.
In the embodiment of the present invention, under the structure of each lens and lens group, focal power, the cooperation that puts in order, Ke Yi
Under conditions of meeting big target surface, high-resolution (highest supports 8,000,000 pixel camera machines), the camera lens of starlight grade large aperture is realized.
On the basis of meeting the parameter request of the above optical system, the structure of each lens group can be had as needed
The adjustment of body, is with reference to the accompanying drawings of the specification described in further detail the embodiment of the present invention.
Embodiment one：
As shown in Fig. 1 (a), for a kind of structural schematic diagram for lens system that the embodiment of the present invention one provides.The lens system
System, it is positive the second lens group that be equipped with focal power successively from the object side to image side along optical axis, which be positive the first lens group 1 and focal power,
2。
As shown in Fig. 1 (a), the first lens group 1 includes successively from the object side to image side along optical axis：Focal power is negative first thoroughly
Mirror 11, focal power are negative the second lens 12, focal power is positive the first sub-lens group 13, focal power is positive the third lens
14；Wherein, the first lens 11 are the meniscus lens convex surface facing object side, and the second lens 12 are biconcave lens, and the third lens 14 are
Surface towards image side is the planoconvex spotlight of plane.
Above-mentioned first sub-lens group 13 includes at least one meniscus lens convex surface facing image side.For example, such as Fig. 1 (a) institutes
Show, the first sub-lens group 13 includes successively from the object side to image side along optical axis：Focal power is that the bent moon just and convex surface facing image side is saturating
Mirror 131 and focal power are negative and convex surface facing the meniscus lens of image side 132.
As shown in Fig. 1 (a), the second lens group includes successively from the object side to image side along optical axis：Focal power is the second son born
Lens group 15, focal power are positive third sub-lens group 16, focal power is positive the 4th lens 17, focal power is the positive 4th
Sub-lens group 18；Wherein, the 4th lens 17 are biconvex lens.
As shown in Fig. 1 (a), above-mentioned second sub-lens group 15 includes successively from the object side to image side along optical axis：Focal power is just
The 5th lens 151 and focal power be negative the 6th lens 152；Wherein, the 5th lens 151 are biconvex lens, the 6th lens
152 be biconcave lens.
Above-mentioned third sub-lens group 16 includes at least two lens.For example, as shown in Fig. 1 (a), 16 edge of third sub-lens group
Optical axis includes successively from the object side to image side：7th lens 161 and the 8th lens 162；Wherein, the 7th lens 161 are for focal power
Just and convex surface facing the meniscus lens of image side, 162 focal power of the 8th lens is negative and convex surface facing the meniscus lens of image side.
Above-mentioned 4th sub-lens group 18 includes at least the meniscus lens convex surface facing object side.For example, as shown in Fig. 1 (a),
4th sub-lens group 18 includes that focal power is just and convex surface facing the meniscus lens of object side 181.
In a better embodiment, as shown in Fig. 1 (a), said lens system can also include：Setting is saturating in the second son
Aperture diaphragm 3 between microscope group 15 and third sub-lens group 16.
In a better embodiment, as shown in Fig. 1 (a), meniscus lens 131 and bent moon are saturating in the first sub-lens group 13
Mirror 132 is glued to constitute glued microscope group.
In a better embodiment, as shown in Fig. 1 (a), the 5th lens 151 and the 6th are saturating in the second sub-lens group 15
Mirror 152 is glued to constitute glued microscope group.
In a better embodiment, as shown in Fig. 1 (a), the 7th lens 161 and the 8th are saturating in third sub-lens group 16
Mirror 162 is glued to constitute glued microscope group.
It should be noted that the lens in above-mentioned gluing microscope group can also be only close together, and without gluing, above-mentioned gluing
Microscope group can be one of which or multigroup gluing, and the embodiment of the present invention is to this without limiting.
In a better embodiment, in order to reduce assembly error and reduce the length of system, the first sub-lens group 13
Meet condition with the third lens 14：3<f3/f<4.5,1.8<f4/f<2.8；Wherein, f3Indicate the focal length of the first sub-lens group 13,
f4Indicate that the focal length of the third lens 14, f indicate the focal length of lens system.This is because f3/ f and f4The ratio of/f is bigger, and first
The assembly error of sub-lens group 13 and the third lens 14 is smaller, and final performance is better, still, if the two ratio mistakes
Greatly, the length of system can be caused bigger than normal, is unfavorable for densification, therefore chooses above-mentioned preferable ratio range.
In a better embodiment, in order to reduce manufacturing tolerance sensibility, the lens in the first sub-lens group 13 and
The refractive index of the glass material of three lens 14 is all higher than 1.8.
Certainly, in another better embodiment, system performance, can also be the first sub-lens group in order to better improve
The refractive index of the glass material of lens and the third lens 14 in 13 is all higher than the 1.8, and first sub-lens group 13 and the third lens
14 meet condition：3<f3/f<4.5,1.8<f4/f<2.8；Wherein, f3Indicate the focal length of the first sub-lens group 13, f4Indicate third
The focal length of lens 14, f indicate that the focal length of lens system, the embodiment of the present invention are not limited thereto.
In a better embodiment, in order to realize low photograph colour imaging and without thermalization (i.e. in -40 DEG C~80 DEG C of environment
Under can blur-free imaging), at least there are four the Abbe numbers of the glass material of lens to be more than 65 in the second lens group 2.
Embodiment two：
Lens system provided by Embodiment 2 of the present invention is similar to the lens system that the embodiment of the present invention one provides, identical
Details are not described herein for part, only illustrates different parts below.
In lens system provided by Embodiment 2 of the present invention, the first sub-lens group 13 may include one convex surface facing image side
Meniscus lens.For example, as shown in Fig. 1 (b), the first sub-lens group 13 includes that focal power is just and convex surface facing the bent moon of image side
Lens 131.
As shown in Fig. 1 (b), the third lens 14 are biconvex lens.
As shown in Fig. 1 (b), the second sub-lens group 15 includes successively from the object side to image side along optical axis：Focal power is positive the
Five lens 151 and focal power are the 6th lens 152 born；Wherein, the 5th lens 151 and the 6th lens 152 be convex surface facing
The meniscus lens of object side.
As shown in Fig. 1 (b), third sub-lens group 16 includes successively from the object side to image side along optical axis：7th lens 161 and
Eight lens 162；Wherein, it is negative biconcave lens that the 7th lens 161, which are focal power, and the 8th lens 162 are that focal power is positive double
Convex lens.
As shown in Fig. 1 (b), the 4th sub-lens group 18 includes successively from the object side to image side along optical axis：Focal power is negative and convex
Meniscus lens 182 and focal power facing towards object side are positive biconvex lens 183.
In a better embodiment, as shown in Fig. 1 (b), the 5th lens 151 and the 6th are saturating in the second sub-lens group 15
Mirror 152 is glued to constitute glued microscope group.
In a better embodiment, as shown in Fig. 1 (b), the 7th lens 161 and the 8th are saturating in third sub-lens group 16
Mirror 162 is glued to constitute glued microscope group.
In a better embodiment, as shown in Fig. 1 (b), meniscus lens 182 and lenticular in the 4th sub-lens group 18
Mirror 183 is glued to constitute glued microscope group.
It should be noted that the lens in above-mentioned gluing microscope group can also be only close together, and without gluing, above-mentioned gluing
Microscope group can be one of which or multigroup gluing, and the embodiment of the present invention is to this without limiting.
Embodiment three：
The lens system that the embodiment of the present invention three provides is similar to the lens system that the embodiment of the present invention one provides, identical
Details are not described herein for part, only illustrates different parts below.
In the lens system that the embodiment of the present invention three provides, as shown in Fig. 1 (c), the first lens 11 can be towards object side
Surface be plane plano-concave lens.
As shown in Fig. 1 (c), the second lens 12 can be the meniscus lens convex surface facing image side.
First sub-lens group 13 may include a meniscus lens convex surface facing image side.For example, as shown in Fig. 1 (c),
First sub-lens group 13 includes that focal power is just and convex surface facing the meniscus lens of image side 131.
As shown in Fig. 1 (c), the third lens 14 are biconvex lens.
As shown in Fig. 1 (c), third sub-lens group 16 includes successively from the object side to image side along optical axis：7th lens 161,
Eight lens 162 and the 9th lens 163；Wherein, it is positive biconvex lens that the 7th lens 161, which are focal power, and the 8th lens 162 are light
Focal power is negative biconcave lens, and the 9th lens 163 are that focal power is positive biconvex lens.
In a better embodiment, as shown in Fig. 1 (c), the 7th lens 161, the 8th lens in third sub-lens group 16
162 and the 9th lens 163 are glued constitutes glued microscope group.
It should be noted that the lens in above-mentioned gluing microscope group can also be only close together, and without gluing, above-mentioned gluing
Microscope group can be one of which or multigroup gluing, and the embodiment of the present invention is to this without limiting.
It should be pointed out that in the embodiment of the present invention, if without particularly pointing out, refractive index all refer to optical glass material relative to
The refractive index (refractive index of the optical glass material obtained by d flash rangings) of d light, Abbe number all refers to optical glass material relative to d
The Abbe number (Abbe number obtained with the refractive index of the optical glass material obtained by d flash rangings) of light.Wherein, d light representations wavelength
For the sodium yellow light of 589.3nm.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of camera lens, from the object side to image side successively along optical axis
Including：The lens system and imaging surface 4 that any embodiment of the present invention provides.Its structural schematic diagram is respectively such as Fig. 2, Fig. 3, Fig. 4 institute
Show, Fig. 2 includes lens system shown in Fig. 1 (a), and Fig. 3 includes lens system shown in Fig. 1 (b), and Fig. 4 includes shown in Fig. 1 (c)
Lens system,.
In a better embodiment, in order to reduce colour cast, as shown in Figure 2, Figure 3, Figure 4, which can also include：If
The optical filter 5 being placed between zoom-lens system and imaging surface 4.
Due to the camera lens of the embodiment of the present invention, using above-mentioned lens system, aberration is corrected well, image planes size
(8.8mm) greatly, imaging resolution is high (highest supports 8,000,000 pixel camera machines), and aperture is big, and (aperture (F/#) can reach
1.03), image quality is excellent.
Three preferred embodiments are enumerated below to understand camera lens provided in an embodiment of the present invention to facilitate.
Example IV：
In specific implementation process, the minute surface of each lens in camera lens shown in Fig. 2 along optical axis from the object side to image side
Radius of curvature R, center thickness Tc (i.e. the distance of adjacent mirror facets central point), refractive index NdWith Abbe number VdMeet the item listed by table 1
Part：
Table 1
Wherein, STO indicates that aperture diaphragm, IMA indicate that image plane, Infinity indicate infinitely great, i.e. plane；Along optical axis from
The minute surface of object side to image side, lens is arranged in order, such as：The minute surface of lens 11 is minute surface 1 and minute surface 2, and the minute surface of lens 12 is
Minute surface 3 and minute surface 4, the minute surface of meniscus lens 131 is minute surface 5 and minute surface 6 in the first sub-lens group 13, and so on, due to the
Meniscus lens 131 and meniscus lens 132 are glued together in one sub-lens group 13, therefore meniscus lens 131 and meniscus lens
132 cemented surface is same minute surface (i.e. minute surface 6), and other cemented surfaces are also similar, and R1 indicates the radius of curvature of minute surface 1 in table 1,
T1 indicates that the distance of minute surface 1 and 2 central point of minute surface, n1 indicate refractive index of the optical glass material of minute surface 1 relative to d light, V1
Indicate Abbe number of the optical glass material relative to d light of minute surface 1, the other parameters in table 1 can and so on its meaning, herein
It repeats no more.
It can be obtained by the data of table 1：
The focal length f of lens system is：8.0mm；
The focal length f of first sub-lens group 133For：25.94mm；
The focal length f of the third lens 144For：15.25mm；
f3/ f=25.94/8=3.24；
f4/ f=15.25/8=1.90；
Meniscus lens 131 and meniscus lens 132 and the glass material of the third lens 14 in first sub-lens group 13
Refractive index is respectively：2.001,2.003,1.954, it is all higher than 1.8.
The glass of the 5th lens 151, the 7th lens 161, the 4th lens 17, meniscus lens 181 in second lens group 2
The Abbe number of material is respectively：81.608,68.624,95.100,68.624, it is all higher than 65.
It is noted that the camera lens of the embodiment of the present invention four has following optical technology index：
Optics overall length TTL：48.0mm；
2 ω of field angle of camera lens：65.6°；
The aperture (F/#) of lens system：1.03；
Camera lens image planes size：8.8mm.
Detailed Optical system is carried out below by the embodiment of the present invention four, is further described the embodiment of the present invention
Four lens systems provided and camera lens.
Optical transfer function be for evaluating the mode that the image quality of an optical system is more accurate, intuitive and common,
Its curve is higher, more smooth, shows that the image quality of system is better, (such as to various aberrations：Spherical aberration, coma, astigmatism, the curvature of field, axis
To aberration, chromatic longitudiinal aberration etc.) carry out good correction.
As shown in figure 5, Fig. 5 is optical transfer function (MTF) curve graph of camera lens visible light part.As can be known from Fig. 5, should
Optical transfer function (MTF) curve graph of camera lens visible light part is smoother, concentrates, and still ensures that in 160lp/mm complete
Visual field MTF average values reach 0.3 or more, it is seen that the camera lens that the present embodiment four provides can reach very high resolution ratio, meet
The imaging requirements of 8000000 pixel camera machines.
Embodiment five：
In specific implementation process, the minute surface of each lens in camera lens shown in Fig. 3 along optical axis from the object side to image side
Radius of curvature R, center thickness Tc, refractive index NdWith Abbe number VdMeet the condition listed by table 2：
Table 2
It can be obtained by the data of table 2：
The focal length f of lens system is：8.3mm；
The focal length f of first sub-lens group 133For：33.53mm；
The focal length f of the third lens 144For：16.88mm；
f3/ f=33.53/8.3=4.04；
f4/ f=16.88/8.3=2.03；
The refractive index of the glass material of meniscus lens 131 and the third lens 14 in first sub-lens group 13 is respectively：
1.883,2.051, be all higher than 1.8.
The glass of the 5th lens 151, the 8th lens 162, the 4th lens 17, biconvex lens 183 in second lens group 2
The Abbe number of material is respectively：68.525,68.525,68.525,68.525, it is all higher than 65.
It is noted that the camera lens of the embodiment of the present invention five has following optical technology index：
Optics overall length TTL：46.0mm；
2 ω of field angle of camera lens：63.5°；
The aperture (F/#) of lens system：1.03；
Camera lens image planes size：8.8mm.
Detailed Optical system is carried out below by the embodiment of the present invention five, is further described the embodiment of the present invention
Five lens systems provided and camera lens.
As shown in fig. 6, Fig. 6 is optical transfer function (MTF) curve graph of camera lens visible light part.As can be known from Fig. 6, should
Optical transfer function (MTF) curve graph of camera lens visible light part is smoother, concentrates, and still ensures that in 160lp/mm complete
Visual field MTF average values reach 0.3 or more, it is seen that the camera lens that the present embodiment five provides can reach very high resolution ratio, meet
The imaging requirements of 8000000 pixel camera machines.
Embodiment six：
In specific implementation process, the minute surface of each lens in camera lens shown in Fig. 4 along optical axis from the object side to image side
Radius of curvature R, center thickness Tc, refractive index NdWith Abbe number VdMeet the condition listed by table 3：Table 3
It can be obtained by the data of table 3：
The focal length f of lens system is：7.88mm；
The focal length f of first sub-lens group 133For：28.15mm；
The focal length f of the third lens 144For：20.55mm；
f3/ f=28.15/7.88=3.57；
f4/ f=20.55/7.88=2.61；
The refractive index of the glass material of meniscus lens 131 and the third lens 14 in first sub-lens group 13 is respectively：
1.816,1.954, it is all higher than 1.8.
The 5th lens 151, the 7th lens 161 in second lens group 2, the 9th lens 163, the 4th lens 17, bent moon are saturating
The Abbe number of the glass material of mirror 181 is respectively：81.608,67.002,67.002,67.002,67.002, it is all higher than 65.
It is noted that the camera lens of the embodiment of the present invention six has following optical technology index：
Optics overall length TTL：46.0mm；
2 ω of field angle of camera lens：70°；
The aperture (F/#) of lens system：1.03；
Camera lens image planes size：8.8mm.
Detailed Optical system is carried out below by the embodiment of the present invention six, is further described the embodiment of the present invention
Six lens systems provided and camera lens.
As shown in fig. 7, Fig. 7 is optical transfer function (MTF) curve graph of camera lens visible light part.As can be known from Fig. 7, should
Optical transfer function (MTF) curve graph of camera lens visible light part is smoother, concentrates, and still ensures that in 160lp/mm complete
Visual field MTF average values reach 0.3 or more, it is seen that the camera lens that the present embodiment six provides can reach very high resolution ratio, meet
The imaging requirements of 8000000 pixel camera machines.
In conclusion an embodiment of the present invention provides a kind of lens system and camera lens, using the optics of specific structure shape
Lens, and being arranged in order in sequence from object side to image side, and focal power by each optical lens distribution, adopt simultaneously
With adaptable optical glass material so that the planform of camera lens, power of lens distribution, the refractive index of lens, Abbe number
Etc. parameters matched with image-forming condition, and then spherical aberration, coma, astigmatism, the curvature of field, chromatic longitudiinal aberration, the axial chromatic aberration of camera lens is made to obtain very
Good correction is big to realize big target surface, high-resolution (highest supports 8,000,000 pixel camera machines), big field angle, starlight grade
The camera lens of aperture；And there is preferable athermal performance, compact-sized, appearance and size is small, and all optical lenses are all made of
Glass spherical design, cold machining process is functional, and production cost is low；It can be widely applied to protection and monitor field, realize whole day
Clearly colour imaging in the case of the dim light of time.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (15)
1. a kind of lens system, which is characterized in that it is the first positive lens to be equipped with focal power successively from the object side to image side along optical axis
Group and focal power are the second positive lens group；
First lens group includes successively from the object side to image side along optical axis：Focal power is negative the first lens, focal power is negative
The second lens, focal power be positive the first sub-lens group, focal power is positive the third lens；Wherein, first sub-lens
Group includes at least one meniscus lens convex surface facing image side；
Second lens group includes successively from the object side to image side along optical axis：Focal power is the second sub-lens group born, focal power
It is positive the 4th lens for positive third sub-lens group, focal power, focal power is positive the 4th sub-lens group；Wherein, described
Four lens are biconvex lens.
2. lens system as described in claim 1, which is characterized in that the first sub-lens group and the third lens meet
Condition：3<f3/f<4.5,1.8<f4/f<2.8；Wherein, f3Indicate the focal length of the first sub-lens group, f4Indicate the third
The focal length of lens, f indicate the focal length of the lens system.
3. lens system as claimed in claim 1 or 2, which is characterized in that lens in the first sub-lens group and described
The refractive index of the glass material of the third lens is all higher than 1.8.
4. lens system as claimed in claim 1 or 2, which is characterized in that at least there are four lens in second lens group
Glass material Abbe number be more than 65.
5. lens system as claimed in claim 1 or 2, which is characterized in that the second sub-lens group along optical axis from object side to
Image side includes successively：Focal power is that positive the 5th lens and focal power are negative the 6th lens；Wherein, the 5th lens are double
Convex lens, the 6th lens are biconcave lens；Or
5th lens and the 6th lens are the meniscus lens convex surface facing object side.
6. lens system as claimed in claim 5, which is characterized in that the third sub-lens group includes at least two lens.
7. lens system as claimed in claim 6, which is characterized in that the third sub-lens group along optical axis from the object side to image side
Include successively：7th lens and the 8th lens；Wherein, it is just and convex surface facing the bent moon of image side that the 7th lens, which are focal power,
Lens, the 8th lens strength are negative and convex surface facing the meniscus lens of image side；Or
It is negative biconcave lens that 7th lens, which are focal power, and the 8th lens are that focal power is positive biconvex lens.
8. lens system as claimed in claim 6, which is characterized in that the third sub-lens group along optical axis from the object side to image side
Include successively：7th lens, the 8th lens and the 9th lens；Wherein, it is positive biconvex lens that the 7th lens, which are focal power,
It is negative biconcave lens that 8th lens, which are focal power, and the 9th lens are that focal power is positive biconvex lens.
9. lens system as claimed in claim 6, which is characterized in that the 4th sub-lens group is included at least convex surface facing object
The meniscus lens of side.
10. lens system as claimed in claim 9, which is characterized in that the 4th sub-lens group include focal power be just and
Convex surface facing the meniscus lens of object side；Or
The 4th sub-lens group includes successively from the object side to image side along optical axis：Focal power is negative and convex surface facing the bent moon of object side
Lens and focal power are positive biconvex lens.
11. lens system as claimed in claim 10, which is characterized in that first lens are the bent moon convex surface facing object side
Lens or towards object side surface be plane plano-concave lens.
12. lens system as claimed in claim 11, which is characterized in that second lens be biconcave lens or convex surface facing
The meniscus lens of image side.
13. lens system as claimed in claim 12, which is characterized in that it is flat that the third lens, which are towards the surface of image side,
The planoconvex spotlight or biconvex lens in face.
14. a kind of camera lens, which is characterized in that include successively from the object side to image side along optical axis：Such as any one of claim 1~13 institute
The lens system and imaging surface stated.
15. camera lens as claimed in claim 14, which is characterized in that further include：It is set to the lens system and the imaging
Optical filter between face.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162226.XA CN108363190B (en) | 2018-02-27 | 2018-02-27 | Lens system and lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810162226.XA CN108363190B (en) | 2018-02-27 | 2018-02-27 | Lens system and lens |
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| CN108363190A true CN108363190A (en) | 2018-08-03 |
| CN108363190B CN108363190B (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810162226.XA Active CN108363190B (en) | 2018-02-27 | 2018-02-27 | Lens system and lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110609380A (en) * | 2019-09-12 | 2019-12-24 | 浙江大华技术股份有限公司 | Lens |
| CN116149014A (en) * | 2022-12-19 | 2023-05-23 | 福建福光股份有限公司 | High-resolution large-image-plane optical imaging system |
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| JP2016206257A (en) * | 2015-04-16 | 2016-12-08 | キヤノン株式会社 | Zoom lens and image capturing device having the same |
| CN106772935A (en) * | 2016-12-07 | 2017-05-31 | 浙江大华技术股份有限公司 | A kind of lens combination and tight shot |
| CN107632369A (en) * | 2017-10-16 | 2018-01-26 | 浙江大华技术股份有限公司 | A kind of tight shot and picture pick-up device |
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| US6078435A (en) * | 1997-11-26 | 2000-06-20 | Asahi Kogaku Kogyo Kabushiki Kaisha | Zoom lens system |
| JP2005316052A (en) * | 2004-04-28 | 2005-11-10 | Tochigi Nikon Corp | Image forming optical system |
| JP2016206257A (en) * | 2015-04-16 | 2016-12-08 | キヤノン株式会社 | Zoom lens and image capturing device having the same |
| CN106772935A (en) * | 2016-12-07 | 2017-05-31 | 浙江大华技术股份有限公司 | A kind of lens combination and tight shot |
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| CN116149014A (en) * | 2022-12-19 | 2023-05-23 | 福建福光股份有限公司 | High-resolution large-image-plane optical imaging system |
| CN116149014B (en) * | 2022-12-19 | 2024-05-03 | 福建福光股份有限公司 | High-resolution large-image-plane optical imaging system |
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| CN108363190B (en) | 2021-02-02 |
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