CN113589479A - Imaging system - Google Patents
Imaging system Download PDFInfo
- Publication number
- CN113589479A CN113589479A CN202110787541.3A CN202110787541A CN113589479A CN 113589479 A CN113589479 A CN 113589479A CN 202110787541 A CN202110787541 A CN 202110787541A CN 113589479 A CN113589479 A CN 113589479A
- Authority
- CN
- China
- Prior art keywords
- lens
- power lens
- imaging system
- negative power
- object side
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
The invention discloses an imaging system, which comprises a standard lens, wherein the object side of the standard lens further comprises a first lens group, an aperture diaphragm, a second negative power lens and a second lens group which are sequentially arranged from the object side to the image side, and the image side of the standard lens further comprises a light filter and an image plane; the imaging system satisfies the following conditions: less than or equal to 50.6 (f)g1/fg2) Xf × tan (FOV) is less than or equal to 63.1; TTL/f is less than or equal to 0.69; wherein f isg1Is the focal length of the first lens group, fg2F is the focal length of the second lens group, f is the focal length of the imaging system, FOV is the field angle of the imaging system, and TTL is the distance between the surface of the first lens group facing the object side and the image surface. On the basis of ensuring the magnification increase, the imaging system with a large target surface and high resolution is realized, and the imaging system is small in size.
Description
Technical Field
The invention relates to the technical field of optical imaging, in particular to an imaging system.
Background
Thanks to the rapid development of the field of intelligent security in recent years, the optical lens is increasingly applied to the field of security, and especially has higher imaging requirements on the optical lens in the fields of intelligent buildings, intelligent traffic and the like.
In order to realize optical magnification, the conventional lens can be realized only by replacing different magnifying objectives, and a plurality of different objective lenses are required to be installed for realizing the change of different magnifications. This not only makes the size of the lens large, but also the cost of the lens is high. The conventional magnification lens on the market is generally large in size, large in lens number, poor in processability and high in cost. The imaging target surface has smaller size, cannot meet the requirements of the current large target surface camera and has poorer imaging property; cannot support today's high resolution requirements. Therefore, on the basis of ensuring the magnification increase, the development of a large-target-surface and high-resolution imaging system becomes more important.
Disclosure of Invention
The embodiment of the invention provides an imaging system, which comprises a standard lens, wherein the object side of the standard lens further comprises a first lens group, an aperture diaphragm, a second negative power lens and a second lens group which are sequentially arranged from the object side to the image side, and the image side of the standard lens further comprises an optical filter and an image plane;
the imaging system satisfies the following conditions:
50.6≤(fg1/fg2)×f×tan(FOV)≤63.1；
TTL/f≤0.69；
wherein f isg1Is the focal length of the first lens group, fg2F is the focal length of the second lens group, f is the focal length of the imaging system, FOV is the field angle of the imaging system, and TTL is the distance between the surface of the first lens group facing the object side and the image surface.
Further, the first lens group includes a first positive power lens and a first negative power lens arranged in order from the object side to the image side.
Further, the first positive power lens includes a double convex lens;
the first negative-power lens comprises a meniscus lens, and one surface of the meniscus lens, which faces the object side, is a concave surface;
the curvature radius of one surface of the first positive focal power lens facing the image side is the same as that of one surface of the first negative focal power lens facing the object side.
Further, the second lens group includes a third negative power lens and a second positive power lens arranged in order from the object side to the image side.
Further, the second negative power lens includes a concave lens, and a surface thereof facing the object side is concave;
the third negative power lens comprises a biconcave lens;
the second positive power lens comprises a meniscus lens, and one surface of the meniscus lens, which faces the object side, is convex;
and the curvature radius of one surface of the third negative power lens facing the image side is the same as that of one surface of the second positive power lens facing the object side.
Further, the first positive focal power lens, the first negative focal power lens, the second negative focal power lens, the third negative focal power lens and the second positive focal power lens are spherical lenses or aspheric lenses.
Further, a curvature radius R1 of a surface of the first positive power lens facing the object side and a curvature radius R4 of a surface of the first negative power lens facing the image side satisfy the following condition:
(R1-R4)/(R1+R4)≤-2.1。
further, the focal length f1 of the first positive power lens, the focal length f2 of the first negative power lens, and the focal length f3 of the second negative power lens satisfy the following conditions:
f1≤31；f2≤-100；f3≤-95。
further, the abbe number Vd1 of the first positive power lens, the abbe number Vd2 of the first negative power lens, the abbe number Vd4 of the third negative power lens and the abbe number Vd5 of the second positive power lens satisfy the following conditions:
Vd1≤71；Vd2≤55；Vd4≤43；Vd5≤30。
further, the refractive index Nd2 of the first negative power lens, the refractive index Nd3 of the second negative power lens, the refractive index Nd4 of the third negative power lens, and the refractive index Nd5 of the second positive power lens satisfy the following conditions:
Nd2≥1.65；Nd3≤1.88；Nd4≤1.92；Nd5≥1.69。
the embodiment of the invention provides an imaging system, which comprises a standard lens, wherein the object side of the standard lens further comprises a first lens group, an aperture diaphragm, a second negative power lens and a second lens group which are sequentially arranged from the object side to the image side, and the image side of the standard lens further comprises an optical filter and an image plane; the imaging system satisfies the following conditions: less than or equal to 50.6 (f)g1/fg2) Xf × tan (FOV) is less than or equal to 63.1; TTL/f is less than or equal to 0.69; wherein f isg1Is the focal length of the first lens group, fg2F is the focal length of the second lens group, f is the focal length of the imaging system, FOV is the field angle of the imaging system, and TTL is the distance between the surface of the first lens group facing the object side and the image surface.
Since, in the embodiment of the present invention, the specific optical lenses and lens groups are arranged in order from the object side to the image side in the imaging system in a specific order, and the imaging system satisfies: less than or equal to 50.6 (f)g1/fg2) Xf × tan (FOV) is less than or equal to 63.1; TTL/f is less than or equal to 0.69; therefore, the imaging system provided by the embodiment of the invention realizes the imaging system with a large target surface and high resolution on the basis of ensuring the magnification increase of the standard lens, and the imaging system has a small size.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an imaging system according to an embodiment of the present invention;
fig. 2 is a graph of an optical transfer function (MTF) of the imaging system in a normal temperature state in a visible light band according to the embodiment of the present invention;
FIG. 3 is a graph of field curvature and distortion in the visible light band for an imaging system provided by an embodiment of the present invention;
FIG. 4 is a diagram of a lateral fan of an imaging system in the visible wavelength band provided by an embodiment of the present invention;
fig. 5 is a dot-column diagram of an imaging system in the visible light band according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an imaging system according to an embodiment of the present invention, where the imaging system includes a standard lens Q, the object side of the standard lens further includes a first lens group G1, an aperture stop P, a second negative power lens L3, and a second lens group G2, which are sequentially arranged from the object side to the image side, and the image side of the standard lens further includes a filter M and an image plane N;
the imaging system satisfies the following conditions:
50.6≤(fg1/fg2)×f×tan(FOV)≤63.1；
TTL/f≤0.69；
wherein f isg1Is the focal length of the first lens group, fg2F is the focal length of the second lens group, f is the focal length of the imaging system, FOV is the field angle of the imaging system, and TTL is the distance between the surface of the first lens group facing the object side and the image surface.
The standard lens is not limited in the embodiment of the present invention, and the standard lens may be a lens with a focal length of 160mm, a lens with a focal length of 180mm, or the like.
Since, in the embodiment of the present invention, the specific optical lenses and lens groups are arranged in order from the object side to the image side in the imaging system in a specific order, and the imaging system satisfies: less than or equal to 50.6 (f)g1/fg2) Xf × tan (FOV) is less than or equal to 63.1; TTL/f is less than or equal to 0.69; therefore, the imaging system provided by the embodiment of the invention realizes the imaging system with large target surface and high resolution on the basis of ensuring the magnification increase of the standard lensAnd the size of the imaging system is small.
In order to further improve the imaging quality of the imaging system, in the embodiment of the present invention, the first lens group includes a first positive power lens L1 and a first negative power lens L2 arranged in order from the object side to the image side.
To further enable the system to be compact, the lens size being smaller, the first positive power lens comprises a biconvex lens;
the first negative-power lens comprises a meniscus lens, and one surface of the meniscus lens, which faces the object side, is a concave surface;
the curvature radius of one surface of the first positive focal power lens facing the image side is the same as that of one surface of the first negative focal power lens facing the object side.
The first positive power lens L1 and the first negative power lens L2 may be attached by fitting or by gluing.
In order to further improve the imaging quality of the lens barrel, in the embodiment of the invention, the second lens group comprises a third negative power lens L4 and a second positive power lens L5 which are arranged in order from the object side to the image side.
In order to further enable the system to be compact and the lens size to be smaller, the second negative power lens includes a concave lens whose surface facing the object side is concave;
the third negative power lens comprises a biconcave lens;
the second positive power lens comprises a meniscus lens, and one surface of the meniscus lens, which faces the object side, is convex;
and the curvature radius of one surface of the third negative power lens facing the image side is the same as that of one surface of the second positive power lens facing the object side.
The third negative power lens and the second positive power lens can be attached or glued.
In order to further improve the imaging quality of the imaging system, in the embodiment of the present invention, the first positive power lens, the first negative power lens, the second negative power lens, the third negative power lens and the second positive power lens are spherical lenses or aspheric lenses.
The aperture size of the aperture diaphragm P determines the aperture value of the system and the depth of field during shooting, the aperture size can be fixed, or the aperture diaphragm with adjustable aperture can be placed according to the requirement to realize the adjustment of the clear aperture, namely the aperture value of the system can be changed and the depth of field can be changed.
In view of the processing technique of the lenses, in order to facilitate the processing of the lenses, in the embodiment of the present invention, the radius of curvature R1 of the surface of the first positive power lens facing the object side and the radius of curvature R4 of the surface of the first negative power lens facing the image side satisfy the following condition:
(R1-R4)/(R1+R4)≤-2.1。
in order to further improve the imaging quality of the imaging system, in the embodiment of the present invention, the focal length f1 of the first positive power lens, the focal length f2 of the first negative power lens, and the focal length f3 of the second negative power lens satisfy the following conditions:
f1≤31；f2≤-100；f3≤-95。
in the embodiment of the present invention, in order to enable an imaging system to clearly image in a large temperature range, in the embodiment of the present invention, the abbe number Vd1 of the first positive power lens, the abbe number Vd2 of the first negative power lens, the abbe number Vd4 of the third negative power lens, and the abbe number Vd5 of the second positive power lens satisfy the following conditions:
Vd1≤71；Vd2≤55；Vd4≤43；Vd5≤30。
in addition, the Abbe number Vd1 of the first positive power lens, the Abbe number Vd2 of the first negative power lens, the Abbe number Vd4 of the third negative power lens and the Abbe number Vd5 of the second positive power lens meet Vd1 ≤ 71; vd2 is less than or equal to 55; vd4 is less than or equal to 43; vd5 is less than or equal to 30, and the chromatic aberration of the image can be reduced, thereby further improving the imaging quality.
In order to further reduce the total length of the imaging system, in the embodiment of the present invention, the refractive index Nd2 of the first negative power lens, the refractive index Nd3 of the second negative power lens, the refractive index Nd4 of the third negative power lens, and the refractive index Nd5 of the second positive power lens satisfy the following conditions:
Nd2≥1.65；Nd3≤1.88；Nd4≤1.92；Nd5≥1.69。
the refractive index Nd2 of the first negative power lens, the refractive index Nd3 of the second negative power lens, the refractive index Nd4 of the third negative power lens and the refractive index Nd5 of the second positive power lens meet the condition that Nd2 is more than or equal to 1.65; nd3 is less than or equal to 1.88; nd4 is less than or equal to 1.92; the Nd5 is more than or equal to 1.69, the spherical aberration can be reduced, and the imaging quality is further improved.
The optical performance of the lens provided by the embodiment of the invention is as follows:
according to the imaging system provided by the embodiment of the invention, on the basis of increasing the multiplying power of the standard lens, the size of the target surface can support phi 42mm to the maximum, and the imaging quality is ensured while the structural miniaturization of the imaging system is effectively realized.
Firstly, the imaging can be supported by a linear array camera with a target surface phi of 42mm at the highest, and the total mechanical length of an imaging system is not more than 45 mm;
under the condition of 30lp/mm, the MTF value of the full field reaches more than 0.4;
and the imaging system has fewer lenses, good processability and low cost control.
The following is an example of the parameters of the imaging system provided by the embodiments of the present invention.
Example 1:
in a specific implementation, the radius of curvature R, the center thickness Tc, the refractive index Nd, and the abbe constant Vd of each lens of the imaging system satisfy the conditions listed in table 1:
TABLE 1 parameter table
The imaging system provided by the embodiment has the following optical technical indexes:
the total optical length TTL is less than or equal to 360 mm;
focal length f: 560 mm;
the field angle: 4.3 degrees;
optical distortion: 0.5 percent;
aperture fno.: FNO is less than or equal to 24.4;
target surface size: is more than or equal to phi 42 mm.
The imaging system provided by the present embodiment will be further described by analyzing the embodiments in detail.
The optical transfer function is used for evaluating the imaging quality of the imaging system in a more accurate, visual and common mode, the higher and smoother curve of the optical transfer function shows that the imaging quality of the system is better, and various aberrations (such as spherical aberration, coma aberration, astigmatism, field curvature, axial chromatic aberration, vertical axis chromatic aberration and the like) are well corrected.
As shown in fig. 2, it is a graph of an optical transfer function (MTF) of the imaging system in a normal temperature state of a visible light band; as shown in fig. 3, is a graph of field curvature and distortion of the imaging system in the visible light band; FIG. 4 shows a lateral fan diagram of the imaging system in the visible band; as shown in fig. 5, a dot diagram of the imaging system in the visible wavelength band is shown.
As can be seen from fig. 2, the optical transfer function (MTF) curve of the imaging system in the normal temperature state in the visible light portion is relatively smooth and concentrated, and the average MTF value of the full field of view (half-image height Y' 21mm) is above 0.4; therefore, the imaging system provided by the embodiment can meet higher imaging requirements;
as can be seen from FIGS. 3 and 4, the distortion of the imaging system is well controlled within 0.5%, and the field curvature is controlled within + -2 mm. Light aberration control is also better.
As can be seen from fig. 5, the radius of the light spot of the imaging system is small and relatively concentrated, and the corresponding aberration and coma are also good.
The embodiment of the invention provides an optical imaging system with low cost, large target surface and high imaging definition. The imaging system adopts 5 optical lenses with specific structural shapes, and the optical lenses are arranged in sequence from the object side to the image side according to a specific sequence, and the imaging system can realize better distortion control and excellent imaging characteristics through the distribution and combination of specific optical powers of the optical lenses.
According to the imaging system provided by the embodiment of the invention, the imaging surface size supports a phi 42sensor (CCD/CMOS) camera to the maximum extent, so that the requirement of high resolution of equipment is met; the full field MTF value reaches more than 0.5 under the condition of 50lp/mm, and the imaging characteristic is excellent; the focal power of each lens of the lens is distributed reasonably, the shape of the lens is convenient to process, and the cost of the lens is low.
The embodiment of the invention provides an imaging system, which comprises a standard lens, wherein the object side of the standard lens further comprises a first lens group, an aperture diaphragm, a second negative power lens and a second lens group which are sequentially arranged from the object side to the image side, and the image side of the standard lens further comprises an optical filter and an image plane; the imaging system satisfies the following conditions: less than or equal to 50.6 (f)g1/fg2) Xf × tan (FOV) is less than or equal to 63.1; TTL/f is less than or equal to 0.69; wherein f isg1Is the focal length of the first lens group, fg2F is the focal length of the second lens group, f is the focal length of the imaging system, FOV is the field angle of the imaging system, and TTL is the distance between the surface of the first lens group facing the object side and the image surface.
Since, in the embodiment of the present invention, the specific optical lenses and lens groups are arranged in order from the object side to the image side in the imaging system in a specific order, and the imaging system satisfies: less than or equal to 50.6 (f)g1/fg2) Xf × tan (FOV) is less than or equal to 63.1; TTL/f is less than or equal to 0.69; therefore, the imaging system provided by the embodiment of the invention realizes the imaging system with a large target surface and high resolution on the basis of ensuring the magnification increase of the standard lens, and the imaging system has a small size.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An imaging system comprises a standard lens, and is characterized in that the object side of the standard lens further comprises a first lens group, an aperture diaphragm, a second negative power lens and a second lens group which are sequentially arranged from the object side to the image side, and the image side of the standard lens further comprises an optical filter and an image plane;
the imaging system satisfies the following conditions:
50.6≤(fg1/fg2)×f×tan(FOV)≤63.1；
TTL/f≤0.69；
wherein f isg1Is the focal length of the first lens group, fg2F is the focal length of the second lens group, f is the focal length of the imaging system, FOV is the field angle of the imaging system, and TTL is the distance between the surface of the first lens group facing the object side and the image surface.
2. The imaging system of claim 1, wherein the first lens group includes a first positive power lens and a first negative power lens arranged in order from an object side to an image side.
3. The imaging system of claim 2, wherein the first positive power lens comprises a biconvex lens;
the first negative-power lens comprises a meniscus lens, and one surface of the meniscus lens, which faces the object side, is a concave surface;
the curvature radius of one surface of the first positive focal power lens facing the image side is the same as that of one surface of the first negative focal power lens facing the object side.
4. The imaging system according to claim 2, wherein the second lens group includes a third negative power lens and a second positive power lens arranged in order from the object side to the image side.
5. The imaging system of claim 4, wherein the second negative power lens comprises a concave lens having a concave surface on a side facing the object side;
the third negative power lens comprises a biconcave lens;
the second positive power lens comprises a meniscus lens, and one surface of the meniscus lens, which faces the object side, is convex;
and the curvature radius of one surface of the third negative power lens facing the image side is the same as that of one surface of the second positive power lens facing the object side.
6. The imaging system of claim 5, wherein the first positive power lens, the first negative power lens, the second negative power lens, the third negative power lens, and the second positive power lens are spherical lenses or aspheric lenses.
7. The imaging system according to claim 2, wherein a radius of curvature R1 of a face of the first positive power lens directed to the object side and a radius of curvature R4 of a face of the first negative power lens directed to the image side satisfy the following condition:
(R1-R4)/(R1+R4)≤-2.1。
8. the imaging system according to claim 2, wherein the focal length f1 of the first positive power lens, the focal length f2 of the first negative power lens, and the focal length f3 of the second negative power lens satisfy the following condition:
f1≤31；f2≤-100；f3≤-95。
9. the imaging system according to claim 4, wherein the abbe number Vd1 of the first positive power lens, the abbe number Vd2 of the first negative power lens, the abbe number Vd4 of the third negative power lens, and the abbe number Vd5 of the second positive power lens satisfy the following conditions:
Vd1≤71；Vd2≤55；Vd4≤43；Vd5≤30。
10. the imaging system according to claim 4, wherein the refractive index Nd2 of the first negative power lens, the refractive index Nd3 of the second negative power lens, the refractive index Nd4 of the third negative power lens, and the refractive index Nd5 of the second positive power lens satisfy the following conditions:
Nd2≥1.65；Nd3≤1.88；Nd4≤1.92；Nd5≥1.69。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110787541.3A CN113589479B (en) | 2021-07-13 | 2021-07-13 | Imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110787541.3A CN113589479B (en) | 2021-07-13 | 2021-07-13 | Imaging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113589479A true CN113589479A (en) | 2021-11-02 |
| CN113589479B CN113589479B (en) | 2023-10-10 |
Family
ID=78247109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110787541.3A Active CN113589479B (en) | 2021-07-13 | 2021-07-13 | Imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113589479B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346916A (en) * | 2019-07-23 | 2019-10-18 | 福建福光天瞳光学有限公司 | A kind of backsight optical system and its working method |
| CN110609375A (en) * | 2019-09-25 | 2019-12-24 | 浙江舜宇光学有限公司 | Optical imaging lens |
| JP6644292B1 (en) * | 2019-03-26 | 2020-02-12 | ナルックス株式会社 | Imaging optical system |
| CN210626760U (en) * | 2019-08-21 | 2020-05-26 | 浙江大华技术股份有限公司 | Lens |
| CN112147763A (en) * | 2020-11-05 | 2020-12-29 | 中山联合光电研究院有限公司 | Fixed focus lens |
-
2021
- 2021-07-13 CN CN202110787541.3A patent/CN113589479B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6644292B1 (en) * | 2019-03-26 | 2020-02-12 | ナルックス株式会社 | Imaging optical system |
| CN110346916A (en) * | 2019-07-23 | 2019-10-18 | 福建福光天瞳光学有限公司 | A kind of backsight optical system and its working method |
| CN210626760U (en) * | 2019-08-21 | 2020-05-26 | 浙江大华技术股份有限公司 | Lens |
| CN110609375A (en) * | 2019-09-25 | 2019-12-24 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN112147763A (en) * | 2020-11-05 | 2020-12-29 | 中山联合光电研究院有限公司 | Fixed focus lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113589479B (en) | 2023-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210348046U (en) | Fisheye lens | |
| CN112731639A (en) | Large-target-surface large-visual-angle machine vision lens | |
| CN114167578B (en) | Lens | |
| CN111722378A (en) | Large-image-plane high-resolution fisheye lens | |
| CN113589478B (en) | Lens | |
| CN110749987B (en) | Lens | |
| CN210626760U (en) | Lens | |
| CN114859532B (en) | Lens and camera device | |
| CN114217412B (en) | Lens | |
| CN114167579B (en) | Lens | |
| CN114236772B (en) | Lens | |
| CN114252981B (en) | optical lens | |
| CN111736328B (en) | Lens | |
| CN209765154U (en) | Zoom lens | |
| CN113589479B (en) | Imaging system | |
| CN212321968U (en) | Large-image-plane high-resolution fisheye lens | |
| CN111142247A (en) | Large-light-transmission zoom lens capable of being used in day and night | |
| CN113484981B (en) | Lens | |
| CN113325546B (en) | Lens | |
| CN113325548B (en) | Lens | |
| CN114924384B (en) | Lens and camera device | |
| CN114924395B (en) | Lens and camera device | |
| CN214335350U (en) | Large-target-surface large-visual-angle machine vision lens | |
| CN210534424U (en) | Optical imaging lens | |
| CN113484980B (en) | Lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |