Optical lens and imaging equipment

A technology of optical lens and imaging surface, applied in the field of imaging lens, can solve the problems of small field of view, high lens cost, and large volume, and achieve the effect of low cost and good imaging performance

Active Publication Date: 2022-02-11
合肥联创光学有限公司
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the surveillance lenses popular in the market have small field of view angles, and it is difficult to obtain imaging images in a large field of view, which cannot meet actual needs; there are also many surveillance lenses with a large number of lenses, or even lenses made of all-glass materials. The cost of the lens is high and the volume is large, which is not conducive to popularization and application in the market

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical lens and imaging equipment
  • Optical lens and imaging equipment
  • Optical lens and imaging equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0071] see figure 1 , which is a schematic structural view of the optical lens 100 provided in the first embodiment of the present invention, the optical lens 100 includes: a first lens L1, a stop ST, a second lens L2, The third lens L3, the fourth lens L4 and the filter G1.

[0072] Wherein, the first lens L1 has negative refractive power, the object side S1 of the first lens is convex, and the image side S2 of the first lens is concave.

[0073] The second lens L2 has positive refractive power, the object side S3 of the second lens is convex at the near optical axis, and the image side S4 of the second lens is convex.

[0074] The third lens L3 has positive refractive power, the object side S5 of the third lens is concave, and the image side S6 of the third lens is convex.

[0075] The fourth lens L4 has negative refractive power, the object side S7 of the fourth lens is concave, and the image side S8 of the fourth lens is convex at the near optical axis.

[0076] Wherein...

no. 2 example

[0088] see Image 6 , which is a schematic structural view of the optical lens 200 provided by the second embodiment of the present invention, the structure of the optical lens 200 provided by the second embodiment of the present invention is substantially the same as that of the optical lens 100 provided by the first embodiment, and the difference mainly lies in , the radius of curvature and material selection of each lens are different.

[0089] Please refer to Table 3, which shows the relevant parameters of each lens in the optical lens provided by the second embodiment of the present invention.

[0090] table 3

[0091]

[0092] Please refer to Table 4, which shows the surface coefficients of each aspheric surface of the optical lens provided by the second embodiment of the present invention.

[0093] Table 4

[0094]

[0095] Please refer to Figure 7 , Figure 8 , Figure 9 and Figure 10 , respectively show the astigmatism curve, vertical axis chromatic abe...

no. 3 example

[0100] see Figure 11 , which is a schematic structural view of the optical lens 300 provided by the third embodiment of the present invention, the structure of the optical lens 300 provided by the third embodiment of the present invention is substantially the same as that of the optical lens 100 provided by the first embodiment, and the difference mainly lies in , the radius of curvature and material selection of each lens are different.

[0101] Please refer to Table 5, which shows the relevant parameters of each lens in the optical lens provided by the third embodiment of the present invention.

[0102] table 5

[0103]

[0104] Please refer to Table 6, which shows the surface coefficients of each aspheric surface of the optical lens 100 provided by the third embodiment of the present invention.

[0105] Table 6

[0106]

[0107] Please refer to Figure 12 , Figure 13 , Figure 14 and Figure 15, which respectively show the astigmatism curve, vertical axis chr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an optical lens and an imaging device. The optical lens comprises in sequence from the object side to the imaging surface along the optical axis: a first lens with negative refractive power, the object side is a convex surface, and the image side is a concave surface; ; a second lens with positive power, the object side is convex at the near optical axis, and the image side is convex; a third lens with positive power, the object side is concave, and the image side is convex; The fourth lens has a concave surface on the object side and a convex surface on the image side near the optical axis; wherein, the first lens, the second lens and the fourth lens are all plastic aspheric lenses, and the third lens is a glass lens. The optical lens has at least the advantages of small size, wide viewing angle, high pixel, day and night confocal, and relatively low cost.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to an optical lens and imaging equipment. Background technique [0002] With the gradual expansion of the application range and scenarios of security monitoring video technology, and the increasing requirements for high-definition, networking, and intelligence of security monitoring, security monitoring lens products are gaining in large field of view, high-definition image output, and confocal color day and night. The technical level requirements for imaging and overcoming the impact of harsh environments on imaging quality are also increasing. [0003] At present, most of the surveillance lenses popular in the market have small field of view angles, and it is difficult to obtain imaging images in a large field of view, which cannot meet actual needs; there are also many surveillance lenses with a large number of lenses, or even lenses made of all-glass materials. The cost ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/00G02B13/004G02B13/18G03B30/00
Inventor 于笑枝曾昊杰曾吉勇
Owner 合肥联创光学有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap