Day-night confocal high-definition zoom optical system

Abstract

A day-night confocal high-definition zoom optical system comprises a first lens group with a negative focal length, a diaphragm, a second lens group with a positive focal length, an IR optical filterand a photosensitive chip which are sequentially arranged from an object side to an image side. The first lens group comprises a first negative meniscus lens with a convex surface facing the object plane, a first biconcave lens and a first biconvex lens which are sequentially arranged from left to right. The second lens group comprises a second biconvex lens, a second negative meniscus lens with aconcave surface facing the object plane, a third biconvex lens, a third negative meniscus lens with a convex surface facing the object plane, a fourth biconvex lens and a fourth negative meniscus lens with a concave surface facing the object plane, which are arranged in sequence from left to right, wherein the first biconcave lens and the first biconvex lens form a first cemented lens, the secondbiconvex lens and the second negative meniscus lens form a second cemented lens, and the fourth biconvex lens and the fourth negative meniscus lens form a third cemented lens. The system has the advantages of large field angle, high image quality, large aperture, small length and the like.

Description

technical field [0001] The invention relates to the field of optics, in particular to a day and night confocal high-definition zoom optical system. Background technique [0002] With the development of high technology, the speed of network data transmission is getting faster and faster, the resolution of chips used in the field of security and video conferencing is also getting higher and higher, and the requirements for lens imaging quality are getting higher and higher. [0003] The optical imaging system in the prior art includes multiple lenses, so there are large aberrations and chromatic aberrations, the tolerance sensitivity of the entire optical system is high, and the imaging quality of the lens is not good. In addition, the lenses in the prior art use plastic lenses, so there is a problem of temperature drift, which affects the sharpness, transmittance and color reproduction of the final lens product, and the field of view is not large enough, the image quality is ...

AI Technical Summary

Problems solved by technology

[0003] The optical imaging system in the prior art contains multiple lenses, so there are large aberrations and chromatic aberrations, the tolerance sensitivity of the entire optical system is high, and the imaging quality of the lens is not good

In addition, the lenses in the prior art use plastic lenses, so there is a problem of temperature drift, which affects the sharpness, transmittance and color reproduction of the final lens product, and the field of view is not large enough, the image quality is not high, and the aperture is not enough Large, difficult to focus day and night, large distortion and other issues

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