CN220773328U - Optical lens with focal length of 6mm - Google Patents
Optical lens with focal length of 6mm Download PDFInfo
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- CN220773328U CN220773328U CN202322337533.6U CN202322337533U CN220773328U CN 220773328 U CN220773328 U CN 220773328U CN 202322337533 U CN202322337533 U CN 202322337533U CN 220773328 U CN220773328 U CN 220773328U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 48
- 239000011521 glass Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 9
- 230000005499 meniscus Effects 0.000 claims abstract description 8
- 238000003384 imaging method Methods 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000004075 alteration Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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Abstract
The utility model relates to an optical lens with a focal length of 6mm, wherein an optical system of the lens consists of a first lens, a second lens, a diaphragm, a third lens, a fourth lens and a fifth lens which are sequentially arranged from left to right along a light incident light path; the first lens is a biconcave negative lens without considering the curvature due to the aspherical coefficient; the second lens is a positive meniscus lens, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens is a negative meniscus lens, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens is a biconvex positive lens; the fifth lens is a biconvex positive lens; wherein the third lens and the fourth lens form a cemented lens group; all lenses are made of glass materials, and the first, second, third, fourth and fifth lenses are glass spherical lenses. The imaging system realizes high-definition imaging, has low sensitivity to environmental change, is not influenced by environmental factors such as temperature, humidity and the like, and meets the application requirements of long-distance and small view fields such as corridor, road, factory and the like.
Description
Technical Field
The utility model relates to an optical lens with a focal length of 6mm, and relates to the technical field of lenses.
Background
Along with the development of technologies such as big data, artificial intelligence, the internet of things and 5G, the extension of the traditional security field is continuously expanded, and various intelligent devices, subdivision applications and operation services are generated. The optical lens is used as an external environment shooting and identifying component, and the required lens performance indexes are different in different application scenes. The size of the focal length of the lens can determine the size of a picture, the size of a field angle and the like. The imaging quality of the traditional lens is poor, and the application requirements of long-distance and small view fields such as corridor, road, factory warehouse and the like are difficult to meet.
Disclosure of Invention
In view of the defects in the prior art, the technical problem to be solved by the utility model is to provide an optical lens with a focal length of 6 mm.
In order to solve the technical problems, the technical scheme of the utility model is as follows: an optical lens with a focal length of 6mm, wherein an optical system of the lens consists of a first lens, a second lens, a diaphragm, a third lens, a fourth lens and a fifth lens which are sequentially arranged from left to right along a light incident light path; the first lens is a biconcave negative lens without considering the curvature due to the aspherical coefficient; the second lens is a positive meniscus lens, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens is a negative meniscus lens, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens is a biconvex positive lens; the fifth lens is a biconvex positive lens; wherein the third lens and the fourth lens form a cemented lens group; all lenses are made of glass materials, and the first, second, third, fourth and fifth lenses are glass spherical lenses.
Preferably, the air space between the first lens and the second lens is 1.81 mm-1.92 mm, the air space between the second lens and the diaphragm is 0.35 mm-0.45 mm, the air space between the diaphragm and the third lens is 0.58 mm-0.70 mm, and the air space between the fourth lens and the fifth lens is 0.75 mm-1.88 mm.
Preferably, the focal length of the optical system is set to be f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are respectively set to be f 1 、f 2 、f 3 、f 4 、f 5 Wherein f 1 、f 2 、f 3 、f 4 、f 5 The following ratio is satisfied with f: -1.5<f 1 /f<-0.5，6.0<f 2 /f<7.0，-3.5<f 3 /f<-2.5，0.5<f 4 /f<1.5，1.5<f 5 /f<2.5。
Preferably, the first lens satisfies the relation: n is more than or equal to 1.5 d ≤1.8，V d More than or equal to 50.0; the second lens satisfies the relation: n (N) d ≥1.8，V d Less than or equal to 50.0; the third lens satisfies the relation: n (N) d ≥1.8，V d Less than or equal to 50.0; the fourth lens satisfies the relation: n is more than or equal to 1.5 d ≤1.8，V d More than or equal to 50.0; the fifth lens satisfies the relation: n (N) d ≥1.8，V d Less than or equal to 50.0; wherein N is d Is of refractive index, V d Is an abbe constant.
Preferably, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 4.5.
Preferably, the F number of the optical system is less than or equal to 2.0.
Preferably, the image height H of the optical system and the focal length f of the optical system satisfy: h/f is more than or equal to 1.0.
Compared with the prior art, the utility model has the following beneficial effects: the optical lens with the focal length of 6mm provided by the utility model adopts five optical lenses, and the lens has higher imaging quality by adjusting parameters such as radius, thickness, materials and the like; the spherical lenses of the optical system are made of glass materials, and compared with plastic materials, the glass materials have smaller absorptivity and better light transmittance, and meanwhile, the relative illuminance of the lens is higher, so that the overall illuminance of the image plane is higher and uniform; the lens design adopts a full glass design, the surface shape of the glass material is less influenced by the change of the ambient temperature, and the compensation effect of the expansion of the lens seat on the back focus is considered, so that the lens can still work normally within the temperature of-40 ℃ to 95 ℃ and the imaging is clear. The application requirements of long-distance and small view fields such as corridor, road, factory and the like are met.
The utility model will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic view of the optical structure of the present utility model;
FIG. 2 is a graph of full operating band axial chromatic aberration of the present utility model;
FIG. 3 is a graph of the vertical chromatic aberration of the full operating band of the present utility model;
FIG. 4 is a graph of the distortion of the full working wave Duan Changqu of the present utility model;
in the figure: l1-a first lens; l2-a second lens; STO-diaphragm; l3-a third lens; l4-fourth lens; l5-fifth lens; l6-equivalent glass plate; IMA-imaging plane.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 to 4, the present embodiment provides an optical lens with a focal length of 6mm, wherein an optical system of the lens is composed of a first lens, a second lens, a diaphragm, a third lens, a fourth lens and a fifth lens which are sequentially arranged from left to right along a light incident path; the first lens is a biconcave negative lens without considering the curvature due to the aspherical coefficient; the second lens is a positive meniscus lens, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens is a negative meniscus lens, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens is a biconvex positive lens; the fifth lens is a biconvex positive lens; wherein the third lens and the fourth lens form a cemented lens group; all lenses are made of glass materials, and the first, second, third, fourth and fifth lenses are glass spherical lenses.
The imaging system realizes high-definition imaging, has low sensitivity to environmental change, is not influenced by environmental factors such as temperature, humidity and the like, and meets the application requirements of long-distance and small view fields such as corridor, road, factory and the like.
In the embodiment of the utility model, the air interval between the first lens and the second lens is 1.81-1.92 mm, the air interval between the second lens and the diaphragm is 0.35-0.45 mm, the air interval between the diaphragm and the third lens is 0.58-0.70 mm, and the air interval between the fourth lens and the fifth lens is 0.75-1.88 mm.
In the embodiment of the utility model, the focal length of the optical system is set to be f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are respectively set to be f 1 、f 2 、f 3 、f 4 、f 5 Wherein f 1 、f 2 、f 3 、f 4 、f 5 The following ratio is satisfied with f: -1.5<f 1 /f<-0.5，6.0<f 2 /f<7.0，-3.5<f 3 /f<-2.5，0.5<f 4 /f<1.5，1.5<f 5 /f<2.5。
In an embodiment of the present utility model, the first lens satisfies the relationship: n is more than or equal to 1.5 d ≤1.8，V d More than or equal to 50.0; the second lens satisfies the relation: n (N) d ≥1.8，V d Less than or equal to 50.0; the third lens satisfies the relation: n (N) d ≥1.8，V d Less than or equal to 50.0; the fourth lens satisfies the relation: n is more than or equal to 1.5 d ≤1.8，V d More than or equal to 50.0; the fifth lens satisfies the relation: n (N) d ≥1.8，V d Less than or equal to 50.0; wherein N is d Is of refractive index, V d Is an abbe constant.
In the embodiment of the present utility model, the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 4.5.
In the embodiment of the utility model, the F number of the optical system is less than or equal to 2.0.
In the embodiment of the utility model, the image height H of the optical system and the focal length f of the optical system satisfy: h/f is more than or equal to 1.0.
In an embodiment of the utility model, the stop of the optical system is located between the second lens and the third lens.
In the embodiment of the utility model, the technical indexes of the implementation of the optical system of the embodiment are as follows:
(1) Focal length: effl=6.0 mm; (2) aperture F is less than or equal to 2.0; (3) angle of view: 2w is more than or equal to 80 degrees; (4) operating band: visible light band.
In order to achieve the above design parameters, the specific designs adopted by the optical system of this embodiment are shown in the following table:
the optical system of the embodiment realizes good correction of on-axis and off-axis aberration, so that the imaging quality of the system reaches higher definition, and meanwhile, the sensitivity of the system to environmental change is lower, and the system keeps a normal working state under a severe working environment.
The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims (7)
1. An optical lens with a focal length of 6mm is characterized in that: the optical system of the lens consists of a first lens, a second lens, a diaphragm, a third lens, a fourth lens and a fifth lens which are sequentially arranged from left to right along a light incident light path; the first lens is a biconcave negative lens without considering the curvature due to the aspherical coefficient; the second lens is a positive meniscus lens, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens is a negative meniscus lens, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface; the fourth lens is a biconvex positive lens; the fifth lens is a biconvex positive lens; wherein the third lens and the fourth lens form a cemented lens group; all lenses are made of glass materials, and the first, second, third, fourth and fifth lenses are glass spherical lenses.
2. The optical lens of claim 1, wherein the focal length is 6mm, wherein: the air interval between the first lens and the second lens is 1.81-1.92 mm, the air interval between the second lens and the diaphragm is 0.35-0.45 mm, the air interval between the diaphragm and the third lens is 0.58-0.70 mm, and the air interval between the fourth lens and the fifth lens is 0.75-1.88 mm.
3. According to claimThe optical lens with the focal length of 6mm described in 1 is characterized in that: setting the focal length of the optical system as f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are respectively f 1 、f 2 、f 3 、f 4 、f 5 Wherein f 1 、f 2 、f 3 、f 4 、f 5 The following ratio is satisfied with f: -1.5<f 1 /f<-0.5，6.0<f 2 /f<7.0，-3.5<f 3 /f<-2.5，0.5<f 4 /f<1.5，1.5<f 5 /f<2.5。
4. The optical lens of claim 1, wherein the focal length is 6mm, wherein: the first lens satisfies the relation: n is more than or equal to 1.5 d ≤1.8，V d More than or equal to 50.0; the second lens satisfies the relation: n (N) d ≥1.8，V d Less than or equal to 50.0; the third lens satisfies the relation: n (N) d ≥1.8，V d Less than or equal to 50.0; the fourth lens satisfies the relation: n is more than or equal to 1.5 d ≤1.8，V d More than or equal to 50.0; the fifth lens satisfies the relation: n (N) d ≥1.8，V d Less than or equal to 50.0; wherein N is d Is of refractive index, V d Is an abbe constant.
5. The optical lens of claim 1, wherein the focal length is 6mm, wherein: the total optical length TTL of the optical system and the focal length f of the optical system satisfy: TTL/f is less than or equal to 4.5.
6. The optical lens of claim 1, wherein the focal length is 6mm, wherein: the F number of the optical system is less than or equal to 2.0.
7. The optical lens of claim 1, wherein the focal length is 6mm, wherein: the image height H of the optical system and the focal length f of the optical system satisfy the following conditions: h/f is more than or equal to 1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322337533.6U CN220773328U (en) | 2023-08-30 | 2023-08-30 | Optical lens with focal length of 6mm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322337533.6U CN220773328U (en) | 2023-08-30 | 2023-08-30 | Optical lens with focal length of 6mm |
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| Publication Number | Publication Date |
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| CN220773328U true CN220773328U (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322337533.6U Active CN220773328U (en) | 2023-08-30 | 2023-08-30 | Optical lens with focal length of 6mm |
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| Country | Link |
|---|---|
| CN (1) | CN220773328U (en) |
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- 2023-08-30 CN CN202322337533.6U patent/CN220773328U/en active Active
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