CN209690608U - A kind of low distortion camera lens - Google Patents
A kind of low distortion camera lens Download PDFInfo
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- CN209690608U CN209690608U CN201920331044.0U CN201920331044U CN209690608U CN 209690608 U CN209690608 U CN 209690608U CN 201920331044 U CN201920331044 U CN 201920331044U CN 209690608 U CN209690608 U CN 209690608U
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Abstract
The utility model discloses a kind of low distortion camera lenses, including front lens group (1), middle lens group (2), diaphragm (5), rear lens group (3) and the focusing group (4) being arranged successively along optical axis from object side to image side；The focal length of the optical system is f, and the focal length of the front lens group (1) is f1, the focal length of the middle lens group (2) is f2, the focal length of the rear lens group (3) is f3, the focal length of the focusing group (4) is f4, meet relational expression respectively: 1.5 < | f1/f|<4.0；0.5<|f2/f|<1.5；1.0<|f3/f|<2.0；5.0<|f4/f|<10.0.The utility model has the characteristics that distortion is low, can effectively reduce the distortion level of image, and use floating focusing mode, meet the imaging requirements and different application demands of operating distance 300mm or more, while its clear aperature can also flexible modulation.
Description
Technical field
The utility model belongs to the technical field of camera lens, and in particular to a kind of low distortion camera lens.
Background technique
Machine vision is exactly to replace human eye with machine to measure and judge.NI Vision Builder for Automated Inspection, which refers to, passes through image capture
The target information that device will detect is converted into picture signal, then carries out various operations to these signals by image processing system
Target signature is extracted, to realize the measurement of target, detection and identification etc..With the development of 2025 strategy of made in China, work
Industry automation is fast-developing, and machine vision is widely used in the neck such as the manufacturing, quality testing, logistics, medicine, scientific research
Domain, and camera lens as machine vision " eyes " in occupation of critical role, in Electronic products manufacturing such as liquid crystal display defects detection, hand
In the application scenarios such as machine touch screen route, the requirement to high quality camera lens is higher and higher.
Wherein, Chinese patent literature discloses a kind of camera lens (publication number: 107632376 A of CN, comprising: along optical axis from object
First lens group of the fixed group of the composition that side to image side is arranged successively and the second lens group, diaphragm and the third for constituting focusing group
Lens group；First lens group is negative-power lenses group；Second lens group and the third lens group are positive light focus
Spend lens group；First lens group is made of three pieces lens；Second lens group includes at least three pieces lens；The third
Lens group is made of four lens.Above-mentioned scheme can improve pixel to a certain extent, but this scheme at least there is also
Following defect: first, structure is complicated；Second, optical distortion is larger, is unable to satisfy the demand of current vision lens.
Utility model content
The purpose of this utility model is that: in view of the deficiencies of the prior art, a kind of low distortion camera lens is provided, has distortion low
The characteristics of, the distortion level of image can be effectively reduced, and use floating focusing mode, meet 300mm or more imaging requirements and
Different application demands, while its clear aperature can also flexible modulation.
To achieve the goals above, the utility model adopts the following technical solution:
A kind of low distortion camera lens, including be arranged successively along optical axis from object side to image side front lens group, middle lens group, light
Door screen, rear lens group and focusing group；
The front lens group includes being arranged successively from object side to image side along optical axis with positive light coke and bent moon structure
First lens G1, the second lens G2 with positive light coke and bent moon structure and with negative power and bent moon structure
Three lens G3；
The middle lens group includes being arranged successively from object side to image side along optical axis with negative power and bent moon structure
4th lens G4, the 5th lens G5 with positive light coke and biconvex structure, the with positive light coke and biconvex structure the 6th are thoroughly
Mirror G6 and the 7th lens G7 with negative power and double-concave structure；
The rear lens group includes being arranged successively from object side to image side along optical axis with positive light coke and bent moon structure
8th lens G8 and the 9th lens G9 with negative power and bent moon structure；
The focusing group includes the with positive light coke and biconvex structure being arranged successively along optical axis from object side to image side
Ten lens G10 and the 11st lens G11 with negative power and double-concave structure；
The focal length of the optical system is f, and the focal length of the front lens group is f1, the focal length of the middle lens group is f2, institute
The focal length for stating rear lens group is f3, the focal length of the focusing group is f4, meet relational expression respectively: 1.5 < | f1/f|<4.0；0.5<|
f2/f|<1.5；1.0<|f3/f|<2.0；5.0<|f4/f|<10.0。
As a kind of improvement of the low distortion camera lens of one kind described in the utility model, the optics rear cut-off distance of the optical system
For BFL, the focal length f of it and the optical system meets relational expression: | BFL/f | < 1.5.
As a kind of improvement of the low distortion camera lens of one kind described in the utility model, half image height of the optical system is
The focal length f of y ', it and the optical system meet relational expression: | y '/f | < 0.5.
As a kind of improvement of the low distortion camera lens of one kind described in the utility model, the refractive index of the first lens G1 is
N1, the refractive index of the first lens G1 meet relational expression: 1.8 < n1 < 2.1.
As a kind of improvement of the low distortion camera lens of one kind described in the utility model, the refractive index of the second lens G2 is
The refractive index of n2, the third lens G3 are n3, and the two meets relational expression: 1.65 < n2 < 1.9 simultaneously；1.65 < n3 < 1.9；
The Abbe number of the second lens G2 is v2, and the Abbe number of the third lens G3 is v3, and the two meets relational expression respectively:
20 < v2 < 35；40 < v3 < 60.
As a kind of improvement of the low distortion camera lens of one kind described in the utility model, the 4th lens G4 and the described 5th
Lens G5 group is shaped to the first balsaming lens U1, the 6th lens G6 and the 7th lens G7 group is shaped to the second gluing thoroughly
The focal length of mirror U2, the first balsaming lens U1 are fU1, the focal length of the second balsaming lens U2 is fU2, described first is glued
The ratio of the focal length of lens U1 and the focal length of the middle lens group meets relational expression: 0.9 < | fU1/f2| < 2.0, second glue
The ratio for closing the focal length of lens U2 and the focal length of the middle lens group meets relational expression: 3.0 < | fU2/f2| < 6.0.
As a kind of improvement of the low distortion camera lens of one kind described in the utility model, the focal length of the tenth lens G10 is
fG10, the focal length of the 11st lens G11 is fG11, the ratio of the focal length of the focal length and focusing group of the tenth lens G10
The ratio of value and the 11st lens G11 and the focal length of the focusing group, while meeting relational expression: 0.05 < | fG10/f4| <
0.2；0.05 < | fG11/f4| < 0.2.
As a kind of improvement of the low distortion camera lens of one kind described in the utility model, the 8th lens G8 and the described 9th
Lens G9 group is shaped to third balsaming lens U3.
As a kind of improvement of the low distortion camera lens of one kind described in the utility model, the refractive index of the 8th lens G8 is
The refractive index of n8, the 9th lens G9 are n9, and the two meets relational expression: 1.7 < n8 < 2.1 simultaneously；1.7 < n9 < 2.1；Institute
The Abbe number for stating the 8th lens G8 is v8, and the Abbe number of the 9th lens G9 is v9, and the two meets relational expression respectively: 40
< v8 < 60；20 < v9 < 35.
As a kind of improvement of the low distortion camera lens of one kind described in the utility model, the first lens G1, described second
Lens G2, the third lens G3, the 4th lens G4, the 5th lens G5, the 6th lens G6, the described 7th are thoroughly
Mirror G7, the 8th lens G8, the 9th lens G9, the tenth lens G10 and the 11st lens G11 are spherical surface
Mirror.
The beneficial effects of the utility model are that the utility model includes before being arranged successively from object side to image side along optical axis
Lens group, middle lens group, diaphragm, rear lens group and focusing group；The front lens group include along optical axis from object side to image side successively
Arrangement the first lens G1 with positive light coke and bent moon structure, the second lens G2 with positive light coke and bent moon structure,
And the third lens G3 with negative power and bent moon structure；The middle lens group include along optical axis from object side to image side successively
Arrangement the 4th lens G4 with negative power and bent moon structure, the 5th lens G5 with positive light coke and biconvex structure,
The 6th lens G6 with positive light coke and biconvex structure and the 7th lens G7 with negative power and double-concave structure；Institute
State rear lens group include the 8th lens G8 with positive light coke and bent moon structure being arranged successively along optical axis from object side to image side,
And the 9th lens G9 with negative power and bent moon structure；The focusing group includes successively arranging along optical axis from object side to image side
The tenth lens G10 with positive light coke and biconvex structure and the with negative power and double-concave structure the 11st of column is saturating
Mirror G11；The focal length of the optical system is f, and the focal length of the front lens group is f1, the focal length of the middle lens group is f2, described
The focal length of rear lens group is f3, the focal length of the focusing group is f4, meet relational expression respectively: 1.5 < | f1/f|<4.0；0.5<|f2/
f|<1.5；1.0<|f3/f|<2.0；5.0<|f4/f|<10.0.Realizing focal length by above structure is the wide work of 75mm high pixel
The optical system of the low distortion camera lens of distance, maximum imaging surface areIts resolution ratio is up to 140lp/mm, highest picture
Element can reach 70,000,000 pixels, and full filed optical distortion is lower than 0.03%；Operating distance is wide, using floating focusing mode, from
300mm~∞ can reach corresponding imaging requirements, be able to satisfy different application demands, while its clear aperature can also be adjusted flexibly
Section.The utility model has the characteristics that distortion is low, can effectively reduce the distortion level of image, effectively improve detection accuracy, and adopt
With floating focusing mode, meet the imaging requirements and different application demands of 300mm or more, while its clear aperature can also be flexible
It adjusts.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the index path of the utility model；
Fig. 3 is the transmission function figure of the utility model；
Fig. 4 is the optical distortion curve graph of the utility model；
Wherein: 1- front lens group；Lens group in 2-；3- rear lens group；4- focusing group；5- diaphragm.
Specific embodiment
As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer within an acceptable error range, those skilled in the art can solve technology within a certain error range
Problem basically reaches technical effect.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as level " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description originally
Utility model and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore should not be understood as limiting the present invention.
In utility model unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation "
Equal terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood at this as the case may be
Concrete meaning in utility model.
The utility model is described in further detail below in conjunction with attached drawing, but not as the restriction to the utility model.
As shown in figures 1-4, a kind of low distortion camera lens, including the front lens group being arranged successively along optical axis from object side to image side
1, middle lens group 2, diaphragm 5, rear lens group 3 and focusing group 4；
Front lens group 1 includes first with positive light coke and bent moon structure being arranged successively along optical axis from object side to image side
Lens G1, the second lens G2 with positive light coke and bent moon structure and the third with negative power and bent moon structure are saturating
Mirror G3；
Middle lens group 2 includes the 4 with negative power and bent moon structure being arranged successively along optical axis from object side to image side
Lens G4, the 5th lens G5 with positive light coke and biconvex structure, the 6th lens G6 with positive light coke and biconvex structure,
And the 7th lens G7 with negative power and double-concave structure；
Rear lens group 3 includes the 8 with positive light coke and bent moon structure being arranged successively along optical axis from object side to image side
Lens G8 and the 9th lens G9 with negative power and bent moon structure；
Focusing group 4 include the tenth with positive light coke and biconvex structure that is arranged successively along optical axis from object side to image side thoroughly
Mirror G10 and the 11st lens G11 with negative power and double-concave structure；
The focal length of optical system is f, and the focal length of front lens group 1 is f1, the focal length of middle lens group 2 is f2, rear lens group 3
Focal length is f3, the focal length of focusing group 4 is f4, meet relational expression respectively: 1.5 < | f1/f|<4.0；0.5<|f2/f|<1.5；1.0<|
f3/f|<2.0；5.0<|f4/f|<10.0。
Preferably, the optics rear cut-off distance of optical system is BFL, and the focal length f of it and optical system meets relational expression: | BFL/f
| < 1.5.
Preferably, half image height of optical system is y ', and the focal length f of it and optical system meets relational expression: | y '/f | <
0.5。
Preferably, the refractive index of the first lens G1 is n1, and the refractive index of the first lens G1 meets relational expression: 1.8 < n1 <
2.1。
Preferably, the refractive index of the second lens G2 is n2, and the refractive index of the third lens G3 is n3, and the two meets relationship simultaneously
Formula: 1.65 < n2 < 1.9；1.65 < n3 < 1.9；The Abbe number of second lens G2 is v2, the Abbe number of the third lens G3
For v3, the two meets relational expression: 20 < v2 < 35 respectively；40 < v3 < 60.
Preferably, the 8th lens G8 and the 9th lens G9 group are shaped to third balsaming lens U3.
Preferably, the refractive index of the 8th lens G8 is n8, and the refractive index of the 9th lens G9 is n9, and the two meets relationship simultaneously
Formula: 1.7 < n8 < 2.1；1.7 < n9 < 2.1；The Abbe number of 8th lens G8 is v8, and the Abbe number of the 9th lens G9 is
V9, the two meet relational expression: 40 < v8 < 60 respectively；20 < v9 < 35.
Preferably, the 4th lens G4 and the 5th lens G5 group are shaped to the first balsaming lens U1, the 6th lens G6 and the 7th
The focal length that lens G7 group is shaped to the second balsaming lens U2, the first balsaming lens U1 is fU1, the focal length of the second balsaming lens U2 is
fU2, the ratio of the focal length of the focal length of the first balsaming lens U1 and middle lens group 2 meets relational expression: 0.9 < | fU1/f2| < 2.0, the
The ratio of the focal length of two balsaming lens U2 and the focal length of middle lens group 2 meets relational expression: 3.0 < | fU2/f2| < 6.0.
Preferably, the focal length of the tenth lens G10 is fG10, the focal length of the 11st lens G11 is fG11, the tenth lens G10's
The ratio of the focal length of the ratio and the 11st lens G11 and focusing group 4 of focal length and the focal length of focusing group 4, while meeting relational expression:
0.05 < | fG10/f4| < 0.2；0.05 < | fG11/f4| < 0.2.
Preferably, the first lens G1, the second lens G2, the third lens G3, the 4th lens G4, the 5th lens G5, the 6th thoroughly
Mirror G6, the 7th lens G7, the 8th lens G8, the 9th lens G9, the tenth lens G10 and the 11st lens G11 are spherical mirror.
Specific optical system data is as follows:
| Surface | Radius | Thickness | Refraction |
| G1 front surface | 61.5 | 5.8 | 2.0 |
| G1 rear surface | 239.1 | 0.1 | |
| G2 front surface | 40.6 | 3.6 | 1.7 |
| G2 rear surface | 49.4 | 4.2 | |
| G3 front surface | 586.8 | 2.2 | 1.8 |
| G3 rear surface | 28.7 | 21.3 | |
| U1 front surface | 259.9 | 2.2 | 1.7 |
| U1 cemented surface | 34.0 | 11.0 | 1.7 |
| U1 rear surface | -119.8 | 0.1 | |
| U2 front surface | 53.7 | 6.1 | 1.9 |
| U2 cemented surface | -32.0 | 3.5 | 1.8 |
| U2 rear surface | 45.6 | 5.1 | |
| Diaphragm | Infinity | 11.5 | |
| U3 front surface | -177.3 | 4.4 | 1.7 |
| U3 cemented surface | -23.2 | 3.3 | 2.0 |
| U3 rear surface | -43.5 | 16.8 | |
| Table before G10 | 109.4 | 4.8 | 1.8 |
| Table after G10 | -109.4 | 4.9 | |
| Table before G11 | -66.9 | 2.2 | 1.6 |
| Table after G11 | 66.9 | 35.8 | |
| Image planes | Infinity |
The focal length f of optical system is 75mm, maximum ring F#=2.8, the focal length f of front lens group 1 in embodiment1=-
206.1mm, the focal length f of middle lens group 22=76.2mm, the focal length f of rear lens group 33=114.1mm, the focal length f of focusing group 44
=-623.8mm, the focal length f of the first balsaming lens group U1U1=103.1mm, the focal length f of the second balsaming lens group U2U2=
377.2mm, the focal length f of the tenth lens G10G10=65.8mm, the focal length f of the 11st lens G11G11=-53.3mm is cut after optics
Away from BFL=35.8mm, half image height y '=22mm.
Each relational expression:
|f1/ f |=2.7；|f2/ f |=1.0；|f3/ f |=1.5；|f4/ f |=8.3
| BFL/f |=0.5；| y '/f |=0.3；|fU1/f2|=1.3；|fU2/f2|=4.9；
|fG10/f4|=0.1；|fG11/f4|=0.08.
Meet relational expression:
1.5<|f1/f|<4.0；0.5<|f2/f|<1.5；1.0<|f3/f|<2.0；5.0<|f4/f|<10.0；
| BFL/f | < 1.5；| y '/f | < 0.5；0.9 < | fU1/f2| < 2.0；3.0 < | fU2/f2| < 6.0；
0.05 < | fG10/f4| < 0.2；0.05 < | fG11/f4| < 0.2.
Fig. 3 show transfer curve figure, and for full filed in mtf value > 0.3 of 140lp/mm, theoretical resolution precision is reachable
3.5 microns, realize the high-resolution imaging of optical system.
Fig. 4 show optical distortion curve graph, and greatest optical distortion is lower than 0.03% within the scope of full filed；
The optical system for the low distortion camera lens that focal length is the wide operating distance of 75mm high pixel is realized by above structure, most
Great achievement image planes areFor its resolution ratio up to 140lp/mm, maximum pixel can reach 70,000,000 pixels, full filed optics
Distortion is lower than 0.03%；Operating distance is wide, using floating focusing mode, can reach corresponding imaging requirements from 300mm~∞,
It is able to satisfy different application demands, while its clear aperature can also flexible modulation.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is modified.Therefore, the utility model is not limited to above-mentioned specific embodiment, all this field skills
It is practical new that art personnel any conspicuous improvement made on the basis of the utility model, replacement or modification belong to this
The protection scope of type.In addition, these terms are intended merely to facilitate although using some specific terms in this specification
It is bright, any restrictions are not constituted to the utility model.
Claims (10)
1. a kind of low distortion camera lens, it is characterised in that: including be arranged successively along optical axis from object side to image side front lens group (1),
Middle lens group (2), diaphragm (5), rear lens group (3) and focusing group (4)；
The front lens group (1) includes the with positive light coke and bent moon structure being arranged successively along optical axis from object side to image side
One lens G1, the second lens G2 with positive light coke and bent moon structure and the third with negative power and bent moon structure
Lens G3；
The middle lens group (2) includes the with negative power and bent moon structure being arranged successively along optical axis from object side to image side
Four lens G4, the 5th lens G5 with positive light coke and biconvex structure, the 6th lens with positive light coke and biconvex structure
G6 and the 7th lens G7 with negative power and double-concave structure；
The rear lens group (3) includes the with positive light coke and bent moon structure being arranged successively along optical axis from object side to image side
Eight lens G8 and the 9th lens G9 with negative power and bent moon structure；
The focusing group (4) includes the ten with positive light coke and biconvex structure being arranged successively along optical axis from object side to image side
Lens G10 and the 11st lens G11 with negative power and double-concave structure；
The focal length of optical system is f, and the focal length of the front lens group (1) is f1, the focal length of the middle lens group (2) is f2, described
The focal length of rear lens group (3) is f3, the focal length of the focusing group (4) is f4, meet relational expression respectively: 1.5 < | f1/f|<4.0；
0.5<|f2/f|<1.5；1.0<|f3/f|<2.0；5.0<|f4/f|<10.0。
2. a kind of low distortion camera lens as described in claim 1, it is characterised in that: the optics rear cut-off distance of the optical system is
The focal length f of BFL, it and the optical system meet relational expression: | BFL/f | < 1.5.
3. a kind of low distortion camera lens as claimed in claim 1 or 2, it is characterised in that: half image height of the optical system is
The focal length f of y ', it and the optical system meet relational expression: | y '/f | < 0.5.
4. a kind of low distortion camera lens as described in claim 1, it is characterised in that: the refractive index of the first lens G1 is n1,
The refractive index of the first lens G1 meets relational expression: 1.8 < n1 < 2.1.
5. a kind of low distortion camera lens as described in claim 1, it is characterised in that: the refractive index of the second lens G2 is n2,
The refractive index of the third lens G3 is n3, and the two meets relational expression: 1.65 < n2 < 1.9 simultaneously；1.65 < n3 < 1.9；Institute
The Abbe number for stating the second lens G2 is v2, and the Abbe number of the third lens G3 is v3, and the two meets relational expression respectively: 20
< v2 < 35；40 < v3 < 60.
6. a kind of low distortion camera lens as claimed in claim 1 or 2, it is characterised in that: the 4th lens G4 and the described 5th
Lens G5 group is shaped to the first balsaming lens U1, the 6th lens G6 and the 7th lens G7 group is shaped to the second gluing thoroughly
The focal length of mirror U2, the first balsaming lens U1 are fU1, the focal length of the second balsaming lens U2 is fU2, described first is glued
The ratio of the focal length of lens U1 and the focal length of the middle lens group (2) meets relational expression: 0.9 < | f U1/ f2| < 2.0, it is described
The ratio of the focal length of second balsaming lens U2 and the focal length of the middle lens group (2) meets relational expression: 3.0 < | f U2/ f2| <
6.0。
7. a kind of low distortion camera lens as claimed in claim 1 or 2, it is characterised in that: the focal length of the tenth lens G10 is
fG10, the focal length of the 11st lens G11 is fG11, the focal length of the focal length of the tenth lens G10 and the focusing group (4)
The ratio of ratio and the 11st lens G11 and the focal length of the focusing group (4), while meeting relational expression: 0.05 < |
f G10/ f4| < 0.2；0.05 < | f G11/ f4| < 0.2.
8. a kind of low distortion camera lens as described in claim 1, it is characterised in that: the 8th lens G8 and the 9th lens
G9 group is shaped to third balsaming lens U3.
9. a kind of low distortion camera lens as claimed in claim 1 or 8, it is characterised in that: the refractive index of the 8th lens G8 is
The refractive index of n8, the 9th lens G9 are n9, and the two meets relational expression: 1.7 < n8 < 2.1 simultaneously；1.7 < n9 < 2.1；Institute
The Abbe number for stating the 8th lens G8 is v8, and the Abbe number of the 9th lens G9 is v9, and the two meets relational expression respectively: 40
< v8 < 60；20 < v9 < 35.
10. a kind of low distortion camera lens as described in claim 1, it is characterised in that: the first lens G1, second lens
G2, the third lens G3, the 4th lens G4, the 5th lens G5, the 6th lens G6, the 7th lens
G7, the 8th lens G8, the 9th lens G9, the tenth lens G10 and the 11st lens G11 are spherical surface
Mirror.
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| CN201920331044.0U CN209690608U (en) | 2019-03-15 | 2019-03-15 | A kind of low distortion camera lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884779A (en) * | 2019-03-15 | 2019-06-14 | 广东奥普特科技股份有限公司 | A kind of low distortion camera lens |
| CN111929832A (en) * | 2020-09-09 | 2020-11-13 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
-
2019
- 2019-03-15 CN CN201920331044.0U patent/CN209690608U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884779A (en) * | 2019-03-15 | 2019-06-14 | 广东奥普特科技股份有限公司 | A kind of low distortion camera lens |
| CN109884779B (en) * | 2019-03-15 | 2023-10-27 | 广东奥普特科技股份有限公司 | Low-distortion lens |
| CN111929832A (en) * | 2020-09-09 | 2020-11-13 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
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