High-precision plastic high-definition lens

Abstract

The invention relates to a high-precision plastic high-definition lens. The optical system of the lens is sequentially provided with a front group A with a negative focal power and a rear group B with a positive focal power along the incident direction of light from left to right. A variable diaphragm C is arranged between the front group A and the rear group B; the front group A is the first one in which the negative crescent lens A-1, the biconcave lens A-2 and the biconvex lens A-3 are closely connected. The latter group B is composed of a second cemented group, biconvex lens B-1, a negative crescent lens B-2, a biconvex lens B-3 and a biconcave lens B-4, which are arranged in sequence. Type lens B-5 and a convex-flat lens B-6. The high-precision plastic high-definition lens can convert the trigger interface lens into a CS interface lens without affecting the imaging effect, and it is easy to install and disassemble. It uses reinforced plastic, has high strength and elastic coefficient, high impact strength, wide operating temperature range, and excellent electrical characteristics. , improve lens yield and back focus consistency.

Description

technical field [0001] The invention relates to a high-precision plastic high-definition lens, which belongs to the field of optical imaging devices of video technology. Background technique [0002] With the rapid development of science and technology, the gradual improvement of people's safety awareness, the rapid development of security engineering. People's requirements for lens quality have also increased accordingly. Reinforced plastic has high strength and elastic coefficient, high impact strength, wide temperature range, excellent electrical characteristics, and is easy to be molded. It is a good material choice. [0003] The CS interface of the existing high-precision mold lens cannot be directly converted from the trigger interface without affecting the imaging effect, resulting in the accumulation or shortage of lenses. The structure of the main metal CS interface lens is complicated and different from that of the metal trigger interface lens. There are many infl...

AI Technical Summary

Problems solved by technology

[0003] The CS interface of the existing high-precision mold lens cannot be directly converted from the trigger interface without affecting the imaging effect, resulting in the accumulation or shortage of lenses. The structure of the main metal CS interface lens is complicated and different from that of the metal trigger interface lens. There are many influencing factors, and the imaging effect is poor. With the emergence of high-precision mold lenses, there are still problems with metal lenses.

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