Low-sensitivity high-definition zoom lens

Abstract

The invention relates to a low-sensitivity high-definition zoom lens. An optical system of the lens is sequentially provided with a front lens group A and a rear lens group B in the incident light direction from the left to the right. A diaphragm C is disposed between the front lens group A and the rear lens group B, and the front lens group A comprises a negative meniscus lens A-1, a biconcave lens A-2, and a biconvex lens A-3, wherein the negative meniscus lens A-1, the biconcave lens A-2 and the biconvex lens A-3 are sequentially arranged from the left to the right. The rear lens group B comprises a gluing group formed by the sealed connection of a biconvex lens B-1 and a negative meniscus lens B-2, a gluing group formed by the sealed connection of a biconvex lens B-3 and a biconcave lens B-4, and a gluing group formed by the sealed connection of a biconvex lens B-5 and a negative meniscus lens B-6. The lens is wide in angle, is high in definition, can be used at daytime and nighttime, is low in tolerance sensitivity, and can be matched with a 500 mega-pixel CCD or CMOS.

Description

technical field [0001] The invention relates to a low-sensitivity high-definition zoom lens. Background technique [0002] The network camera was born in the middle of 1990s. The lens is the main component of the camera, and its performance directly affects the image quality. In the early days, there were various zoom lenses used in security systems in the market. However, due to the large number of optical lenses in many products, the difficulty of assembly and adjustment was increased, and the optical performance index was low. Most of them belonged to low-end products and could only be used for Ordinary cameras with lower pixels, and it is difficult to achieve the advantages of large wide-angle, low sensitivity, low cost, high resolution, parfocal day and night, and fewer lenses. Contents of the invention [0003] The object of the present invention is to provide a low-sensitivity high-definition zoom lens for the above deficiencies. [0004] The technical solution of...

AI Technical Summary

Problems solved by technology

In the early days, there were various zoom lenses used in security systems in the market. However, due to the large number of optical lenses in many products, the difficulty of assembly and adjustment was increased, and the optical performance index was low. Most of them belonged to low-end products and could only be used for It is difficult to achieve the advantages of large wide-angle, low sensitivity, low cost, high resolution, parfocal day and night, and fewer lenses with ordinary cameras with lower pixels.

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