CN110058390B - Low-distortion wide-angle lens - Google Patents
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- CN110058390B CN110058390B CN201910340151.4A CN201910340151A CN110058390B CN 110058390 B CN110058390 B CN 110058390B CN 201910340151 A CN201910340151 A CN 201910340151A CN 110058390 B CN110058390 B CN 110058390B
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/17—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +--
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Abstract
The invention belongs to the technical field of lenses, and particularly relates to a low-distortion lensAn optical system of the wide-angle lens comprises a front lens group (S1), a middle lens group (S2), a diaphragm (S4) and a focusing group (S3) which are sequentially arranged from an object plane to an image plane (S5) along an optical axis; the focal length of the optical system is f, and the focal length of the front lens group (S1) is f 1 The focal length of the middle lens group (S2) is f 2 The focal length of the focusing group (S3) is f 3 The following relations are satisfied: 0.70<|f 1 /f|<1.60，1.8<|f 2 /f|<4.0，2.0<|f 3 /f|<5.0. The invention has the characteristic of low distortion, can effectively reduce the distortion degree of images, adopts a floating focusing mode, meets the imaging requirement of more than 100mm of working distance and different application requirements, and simultaneously can flexibly adjust the clear aperture.
Description
Technical Field
The invention belongs to the technical field of lenses, and particularly relates to a low-distortion wide-angle lens.
Background
Under the background of industrial automation, a machine vision system is rapidly developed and widely applied to various fields such as measurement, judgment, defect detection, food packaging, intelligent logistics, medical diagnosis and the like. And the lens is used as the core of the machine vision system, and the imaging quality of the lens is a key factor of success and failure of the machine vision system. The wide-angle lens has a large visual angle and a wide visual field, and can be used for detecting the packaging state of a high-density printed circuit board, confirming the surface states of lines and wires on a large-size metal plate, detecting the micro damage of a sheet-shaped film, detecting the pixel missing of a liquid crystal display screen and the like. With the development of technology, the requirements on distortion, resolution and the like of the wide-angle lens are more strict, and the defects of different types or different degrees such as low pixels, large distortion, small field angle and the like of the existing wide-angle machine vision lens in China generally exist, so that the research and development of the distortion wide-angle lens are more urgent.
Disclosure of Invention
The invention aims at: aiming at the defects of the prior art, the low-distortion wide-angle lens has the characteristic of low distortion, the optical distortion of the whole field of view is lower than 0.7%, and the distortion degree of an image can be effectively reduced; and the floating focusing mode is adopted, the distance of the object plane is wide, the imaging requirement and different application requirements of objects with the object plane being more than 100mm away from the optical system can be met, and meanwhile, the clear aperture of the optical system can be flexibly adjusted.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an optical system of the lens comprises a front lens group S1, a middle lens group S2, a diaphragm S4 and a focusing group S3 which are sequentially arranged from an object plane to an image plane S5 along an optical axis;
the front lens group S1 includes a first lens G1 having positive power and a meniscus structure, a second lens G2 having negative power and a meniscus structure, and a third lens G3 having negative power and a meniscus structure, which are sequentially arranged along the optical axis from the object plane to the image plane S5;
the middle lens group S2 includes a fourth lens G4 having negative power and a biconcave structure, a fifth lens G5 having positive power and a biconvex structure, a sixth lens G6 having negative power and a meniscus structure, and a seventh lens G7 having positive power and a meniscus structure, which are sequentially arranged from the object plane to the image plane S5 along the optical axis;
the focusing group S3 includes an eighth lens G8 having positive power and a biconvex structure, a ninth lens G9 having negative power and a meniscus structure, a tenth lens G10 having negative power and a biconcave structure, an eleventh lens G11 having positive power and a biconvex structure, a twelfth lens G12 having positive power and a biconvex structure, and a thirteenth lens G13 having negative power and a meniscus structure, which are sequentially arranged from the object plane to the image plane S5 along the optical axis;
the focal length of the optical system is f, and the focal length of the front lens group S1 is f 1 The focal length of the middle lens group S2 is f 2 The focal length of the focusing group S3 is f 3 The following relations are satisfied: 0.70<|f 1 /f|<1.60，1.8<|f 2 /f|<4.0，2.0<|f 3 /f|<5.0。
As an improvement of the low-distortion wide-angle lens of the present invention, a distance from the diaphragm S4 to the image surface S5 is D, and a ratio of D to f satisfies a relation: d/f < 4.0.
As an improvement of the low-distortion wide-angle lens of the present invention, the half image height of the optical system is y ', and the ratio of y' to f satisfies the relation: y'/f < 1.3.
As an improvement of the low-distortion wide-angle lens of the present invention, the refractive index n1 of the first lens G1 satisfies the relation: 1.7< n1<2.0, the refractive index n2 of the second lens G2 satisfying the relation: 1.7< n2<2.0, the refractive index n3 of the third lens G3 satisfying the relation: 1.7< n3<2.0.
As an improvement of the low-distortion wide-angle lens of the present invention, the fourth lens G4 and the fifth lens G5 form a first cemented lens U1, and the focal length of the first cemented lens U1 is f U1 Said f U1 And f is equal to 2 The ratio of (2) satisfies the relation: 1.5< |f U1 /f 2 |＜3.0。
As an improvement of the low-distortion wide-angle lens of the present invention, the sixth lens G6 and the seventh lens G7 form a second cemented lens U2, and the focal length of the second cemented lens U2 is f U2 Said f U2 And f is equal to 2 The ratio of (2) satisfies the relation: 1.5< |f U2 /f 2 |＜3.0。
As an improvement of the low-distortion wide-angle lens of the present invention, the eighth lens G8 and the ninth lens G9 form a third cemented lens U3, and the focal length of the third cemented lens U3 is f U3 Said f U3 And f is equal to 3 The ratio of (2) satisfies the relation: 0.5 < |f U3 /f 3 |＜1.0。
As an improvement of the low-distortion wide-angle lens of the present invention, the refractive index n10 of the tenth lens G10 and the refractive index n13 of the thirteenth lens G13 satisfy the relationship: 1.75< n10<2.1,1.75< n13<2.1.
As an improvement of the low-distortion wide-angle lens of the present invention, the refractive index n11 of the eleventh lens G11 and the refractive index n12 of the twelfth lens G12 satisfy the relationship: 1.5< n11<1.8,1.5< n12<1.8.
As an improvement of the low-distortion wide-angle lens of the present invention, the first lens G1, the second lens G2, the third lens G3, the fourth lens G4, the fifth lens G5, the sixth lens G6, the seventh lens G7, the eighth lens G8, the ninth lens G9, the tenth lens G10, the eleventh lens G11, the twelfth lens G12, and the thirteenth lens G13 are spherical mirrors.
The invention has the beneficial effects that the optical system of the lens comprises a front lens group S1, a middle lens group S2, a diaphragm S4 and a focusing group S3 which are sequentially arranged from an object plane to an image plane S5 along the optical axis, and the focal length f of the front lens group S1 1 Focal length f of the middle lens group S2 2 Focal length f of focusing group S3 3 The focal lengths f of the optical systems respectively satisfy the relation: 0.70<|f 1 /f|<1.60，1.8<|f 2 /f|<4.0，2.0<|f 3 /f|<5.0, the optical structure can realize the technical effect of low distortion of the machine vision lens, and the optical distortion of the whole field of view of the optical system is lower than 0.7%; moreover, the optical structure ensures that the working distance of the optical system is wide, and the floating focusing mode is adopted, so that the corresponding imaging requirements can be met from 100mm to infinity, and the application requirements of different scenes can be met; in the optical structure, the first lens G1, the second lens G2 and the third lens G3 of the front lens group S1 are all meniscus structures, and the positive-negative focal power distribution mode is adopted to effectively reduce the incidence angle of the principal ray on each optical surface of the first lens G1, the second lens G2 and the third lens G3, thereby being beneficial to correcting off-axis aberration and reducing distortion; the diaphragm S4 is positioned between the middle lens group S2 and the focusing group S3, and a sufficient air space is reserved between the front and the rear of the diaphragm S4, so that the clear aperture of the optical system can be flexibly adjusted.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a graph of optical distortion for the present invention.
Wherein, G1-first lens, G2-second lens, G3-third lens, G4-fourth lens, G5-fifth lens, G6-sixth lens, G7-seventh lens, G8-eighth lens, G9-ninth lens, G10-tenth lens, G11-eleventh lens, G12-twelfth lens, G13-thirteenth lens, U1-first cemented lens, U2-second cemented lens, U3-third cemented lens, S1-front lens group, S2-middle lens group, S3-focusing group, S4-diaphragm, S5-image plane.
Detailed Description
As a particular component is referred to by some of the terms used in the description and claims, it should be understood by those skilled in the art that a manufacturer may refer to the same component by different terms. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The present invention will be described in further detail below with reference to the drawings, but is not limited thereto.
As shown in fig. 1, an optical system of the low-distortion wide-angle lens includes a front lens group S1, a middle lens group S2, a stop S4, and a focus group S3 arranged in this order from an object plane to an image plane S5 along an optical axis;
the front lens group S1 comprises a first lens G1 with positive focal power and a meniscus structure, a second lens G2 with negative focal power and a meniscus structure and a third lens G3 with negative focal power and a meniscus structure which are sequentially arranged from an object plane to an image plane S5 along an optical axis, wherein the positive-negative focal power distribution mode effectively reduces incidence angles of main light rays on each optical surface of the first lens G1, the second lens G2 and the third lens G3, is beneficial to correcting off-axis aberration and reducing distortion;
the middle lens group S2 includes a fourth lens G4 having negative power and a biconcave structure, a fifth lens G5 having positive power and a biconvex structure, a sixth lens G6 having negative power and a meniscus structure, and a seventh lens G7 having positive power and a meniscus structure, which are sequentially arranged from the object plane to the image plane S5 along the optical axis;
the focusing group S3 includes an eighth lens G8 having positive power and a biconvex structure, a ninth lens G9 having negative power and a meniscus structure, a tenth lens G10 having negative power and a biconcave structure, an eleventh lens G11 having positive power and a biconvex structure, a twelfth lens G12 having positive power and a biconvex structure, and a thirteenth lens G13 having negative power and a meniscus structure, which are sequentially arranged from the object plane to the image plane S5 along the optical axis;
the focal length of the optical system is f, and the focal length of the front lens group S1 is f 1 The focal length of the middle lens group S2 is f 2 The focal length of the focusing group S3 is f 3 The following relations are satisfied: 0.70<|f 1 /f|<1.60，1.8<|f 2 /f|<4.0，2.0<|f 3 /f|<5.0, the above relation enables the optical system to achieve the technical effect of low distortion, and the focal length of the front lens group S1 and the focal length of the middle lens group S2 along the direction from the object plane to the image plane S5And the focal length of the focusing group S3 is sequentially increased, so that the optical system can reach corresponding imaging requirements from 100mm to infinity.
Preferably, in order to flexibly adjust the clear aperture of the optical system, the distance from the diaphragm S4 to the image plane S5 is D, and the ratio of D to f satisfies the relation: d/f < 4.0.
Preferably, in order to better adjust the imaging range of the optical system, the half image height of the optical system is y ', and the ratio of y' to f satisfies the relation: y'/f < 1.3.
Preferably, in order to improve the refraction effect after the light enters the lens, the refractive index n1 of the first lens G1 satisfies the relationship: 1.7< n1<2.0, the refractive index n2 of the second lens G2 satisfying the relation: 1.7< n2<2.0, the refractive index n3 of the third lens G3 satisfying the relation: 1.7< n3<2.0.
Preferably, the fourth lens G4 and the fifth lens G5 form a first cemented lens U1, and the focal length of the first cemented lens U1 is f U1 Said f U1 And f is equal to 2 The ratio of (2) satisfies the relation: 1.5< |f U1 /f 2 |＜3.0。
Preferably, the sixth lens G6 and the seventh lens G7 form a second cemented lens U2, and the focal length of the second cemented lens U2 is f U2 Said f U2 And f is equal to 2 The ratio of (2) satisfies the relation: 1.5< |f U2 /f 2 |＜3.0。
Preferably, the eighth lens G8 and the ninth lens G9 form a third cemented lens U3, and the focal length of the third cemented lens U3 is f U3 Said f U3 And f is equal to 3 The ratio of (2) satisfies the relation: 0.5 < |f U3 /f 3 |＜1.0。
Preferably, the refractive index n10 of the tenth lens G10 and the refractive index n13 of the thirteenth lens G13 satisfy the relationship: 1.75< n10<2.1,1.75< n13<2.1.
Preferably, the refractive index n11 of the eleventh lens G11 and the refractive index n12 of the twelfth lens G12 satisfy the relationship: 1.5< n11<1.8,1.5< n12<1.8.
Preferably, in order to facilitate the manufacture of lenses, the first lens G1, the second lens G2, the third lens G3, the fourth lens G4, the fifth lens G5, the sixth lens G6, the seventh lens G7, the eighth lens G8, the ninth lens G9, the tenth lens G10, the eleventh lens G11, the twelfth lens G12, and the thirteenth lens G13 are spherical mirrors.
Specific optical system data are as follows:
| surface of the body | Radius (mm) | Thickness (mm) | Refractive index |
| G1 front surface | 29.9 | 6.6 | 1.9 |
| G1 rear surface | 58.4 | 0.1 | |
| G2 front surface | 20.7 | 1.2 | 1.9 |
| G2 rear surface | 10.8 | 5.9 | |
| G3 front surface | 166.7 | 1.0 | 1.9 |
| G3 rear surface | 10.5 | 4.3 | |
| U1 front surface | -47.821 | 5.6 | 1.8 |
| U1 bonding surface | 10.0 | 10.0 | 1.8 |
| U1 back surface | -21.0 | 6.3 | |
| U2 front surface | 18.4 | 1.0 | 1.8 |
| U2 glued surface | 7.7 | 2.6 | 1.8 |
| U2 back surface | 38.4 | 1.9 | |
| Diaphragm | ∞ | 2.4 | |
| U3 front surface | 47.8 | 2.1 | 1.6 |
| U3 glued surface | -7.1 | 0.8 | 1.8 |
| U3 rear surface | -11.2 | 1.9 | |
| G10 front surface | -9.6 | 0.8 | 2.0 |
| G10 rear surface | 30.5 | 0.7 | |
| G11 front surface | 17.3 | 5.1 | 1.5 |
| G11 rear surface | -9.7 | 0.1 | |
| G12 front surface | 52.0 | 3.8 | 1.7 |
| G12 rear surface | -14.5 | 1.2 | |
| G13 front surface | -9.5 | 0.9 | 2.0 |
| G13 rear surface | -16.1 | 12.4 | |
| Image plane | ∞ |
In the embodiment, the focal length F of the optical system is 8.5mm, the maximum aperture is f# =2.4, and the focal length F of the front lens group S1 1 = -10.11mm, focal length f of middle lens group S2 2 Focal length f of focusing group S3 =17.20 mm 3 =23.06 mm, focal length f of first cemented lens U1 U1 =32.10 mm, focal length f of second cemented lens U2 U2 =36.35 mm, focal length f of third cemented lens U3 U3 19.01mm, distance d=32.68 mm from stop S4 to image plane S5, half image height y' =8.8 mm.
Each relation: i f 1 /f|＝1.19；|f 2 /f|＝2.02；|f 3 /f|＝2.71；|D/f|＝3.85；|y’/f|＝1.03；|f U1 /f 2 |＝1.87；|f U2 /f 2 |＝2.11；|f U3 /f 3 |＝0.82。
The relation is satisfied: 0.70<|f 1 /f|<1.60；1.8<|f 2 /f|<4.0；2.0<|f 3 /f|<5.0；|D/f|＜4.0；|y’/f|＜1.3；1.5＜|f U1 /f 2 |、|f U2 /f 2 |＜3.0；0.5＜|f U3 /f 3 |＜1.0。
Fig. 2 shows a graph of optical distortion with a maximum optical distortion of less than 1.0% over the full field of view and an average optical distortion of less than 0.7% over the full field of view.
The optical structure can meet the imaging requirement of 100mm to infinity, can meet the application requirements of different scenes, and meanwhile, the clear aperture of the optical structure can be flexibly adjusted.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the invention pertains from the foregoing disclosure and teachings. Therefore, the present invention is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (10)
1. A low distortion wide angle lens, characterized by: the optical system of the lens comprises a front lens group (S1), a middle lens group (S2), a diaphragm (S4) and a focusing group (S3) which are sequentially arranged from an object plane to an image plane (S5) along an optical axis;
the front lens group (S1) comprises a first lens (G1) with positive focal power and a meniscus structure, a second lens (G2) with negative focal power and a meniscus structure and a third lens (G3) with negative focal power and a meniscus structure, which are sequentially arranged from an object plane to an image plane (S5) along an optical axis;
the middle lens group (S2) comprises a fourth lens (G4) with negative focal power and a biconcave structure, a fifth lens (G5) with positive focal power and a biconvex structure, a sixth lens (G6) with negative focal power and a meniscus structure and a seventh lens (G7) with positive focal power and a meniscus structure, which are sequentially arranged from an object plane to an image plane (S5) along an optical axis;
the focusing group (S3) comprises an eighth lens (G8) with positive focal power and a biconvex structure, a ninth lens (G9) with negative focal power and a meniscus structure, a tenth lens (G10) with negative focal power and a biconcave structure, an eleventh lens (G11) with positive focal power and a biconvex structure, a twelfth lens (G12) with positive focal power and a biconvex structure and a thirteenth lens (G13) with negative focal power and a meniscus structure, which are sequentially arranged from an object plane to an image plane (S5) along an optical axis;
the focal length of the optical system is f, and the focal length of the front lens group (S1) is f 1 The focal length of the middle lens group (S2) is f 2 The focal length of the focusing group (S3) is f 3 The following relations are satisfied: 0.70<|f 1 /f|<1.60，1.8<|f 2 /f|<4.0，2.0<|f 3 /f|<5.0。
2. A low distortion wide angle lens as set forth in claim 1, wherein: the distance from the diaphragm (S4) to the image surface (S5) is D, and the ratio of D to f satisfies the relation: d/f < 4.0.
3. A low distortion wide angle lens as set forth in claim 1, wherein: the half image height of the optical system is y ', and the ratio of y' to f satisfies the relation: y'/f < 1.3.
4. A low distortion wide angle lens as set forth in claim 1, wherein: the refractive index n1 of the first lens (G1) satisfies the relation: 1.7< n1<2.0, the refractive index n2 of the second lens (G2) satisfying the relation: 1.7< n2<2.0, the refractive index n3 of the third lens (G3) satisfying the relation: 1.7< n3<2.0.
5. A low distortion wide angle lens as set forth in claim 1, wherein: the fourth lens (G4) and the fifth lens (G5) form a first cemented lens (U1), and the focal length of the first cemented lens (U1) is f U1 Said f U1 And f is equal to 2 The ratio of (2) satisfies the relation: 1.5< |f U1 /f 2 |＜3.0。
6. A low distortion wide angle lens as set forth in claim 1, wherein: the sixth lens (G6) and the seventh lens (G7) form a second cemented lens (U2), and the focal length of the second cemented lens (U2) is f U2 Said f U2 And f is equal to 2 The ratio of (2) satisfies the relation: 1.5< |f U2 /f 2 |＜3.0。
7. A low distortion wide angle lens as set forth in claim 1, wherein: the eighth lens (G8) and the ninth lens (G9) form a third cemented lens (U3), and the focal length of the third cemented lens (U3) is f U3 Said f U3 And f is equal to 3 The ratio of (2) satisfies the relation: 0.5 < |f U3 /f 3 |＜1.0。
8. A low distortion wide angle lens as set forth in claim 1, wherein: the refractive index n10 of the tenth lens (G10) and the refractive index n13 of the thirteenth lens (G13) satisfy the relationship: 1.75< n10<2.1,1.75< n13<2.1.
9. A low distortion wide angle lens as set forth in claim 1, wherein: the refractive index n11 of the eleventh lens (G11) and the refractive index n12 of the twelfth lens (G12) satisfy the relationship: 1.5< n11<1.8,1.5< n12<1.8.
10. A low distortion wide angle lens as set forth in claim 1, wherein: the first lens (G1), the second lens (G2), the third lens (G3), the fourth lens (G4), the fifth lens (G5), the sixth lens (G6), the seventh lens (G7), the eighth lens (G8), the ninth lens (G9), the tenth lens (G10), the eleventh lens (G11), the twelfth lens (G12) and the thirteenth lens (G13) are spherical mirrors.
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| CN114488485B (en) * | 2022-02-14 | 2023-07-07 | 合肥埃科光电科技股份有限公司 | Large-target-surface wide-angle low-distortion industrial lens with f22mm |
| CN114815178A (en) * | 2022-05-11 | 2022-07-29 | 广东奥普特科技股份有限公司 | High-resolution wide-angle optical lens and optical equipment |
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| JP2015094868A (en) * | 2013-11-12 | 2015-05-18 | キヤノン株式会社 | Zoom lens and imaging apparatus including the same |
| JP2015135439A (en) * | 2014-01-20 | 2015-07-27 | 株式会社ニコン | Amphibian variable magnification lens, imaging device and manufacturing method of amphibian variable magnification lens |
| CN106133579A (en) * | 2014-03-27 | 2016-11-16 | 株式会社尼康 | The manufacture method of zoom lens, camera head and zoom lens |
| CN209858837U (en) * | 2019-04-25 | 2019-12-27 | 奥普特视觉科技(苏州)有限公司 | Low-distortion wide-angle lens |
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| JP6917538B2 (en) * | 2017-04-17 | 2021-08-11 | パナソニックＩｐマネジメント株式会社 | Imaging optical system, imaging device, camera system |
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| CN101174021A (en) * | 2006-11-03 | 2008-05-07 | 三星Techwin株式会社 | High magnification zoom lens |
| JP2015094868A (en) * | 2013-11-12 | 2015-05-18 | キヤノン株式会社 | Zoom lens and imaging apparatus including the same |
| JP2015135439A (en) * | 2014-01-20 | 2015-07-27 | 株式会社ニコン | Amphibian variable magnification lens, imaging device and manufacturing method of amphibian variable magnification lens |
| CN106133579A (en) * | 2014-03-27 | 2016-11-16 | 株式会社尼康 | The manufacture method of zoom lens, camera head and zoom lens |
| CN209858837U (en) * | 2019-04-25 | 2019-12-27 | 奥普特视觉科技(苏州)有限公司 | Low-distortion wide-angle lens |
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