Wide-spectrum continuous zooming camera lens

Abstract

The invention provides a wide-spectrum continuous zooming camera lens. The lens is sequentially provided with a front fixed group A with positive focal power, a rear fixed group B with positive focal power and a rear fixed group C with negative focal power along the incidence direction of light from left to right; a zoom group B with negative focal power; a variable diaphragm assembly C; the focal power of the rear fixed group D is positive; and a compensation group E with positive focal power. The front fixed group A is sequentially provided with a first gluing group, a biconvex lens A-3 and a positive meniscus lens A-4 in the light incidence direction, wherein the first gluing group is formed by tightly connecting a negative meniscus lens A-1 and a positive meniscus lens A-2; the zoom group B is sequentially provided with a negative meniscus lens B-1, a biconcave lens B-2 and a positive meniscus lens B-3 along the light incidence direction; the rear fixed group D is sequentially provided with a biconvex lens D-1, a second gluing group formed by tightly connecting a biconvex lens D-2 and a negative meniscus lens D-3, and a negative meniscus lens D-4 along the light incidence direction; and the compensation group E is provided with a third gluing group formed by closely connecting a biconvex lens E-1 and a negative meniscus lens E-2. The lens has the advantages of small volume of the whole system, constant aperture value in the zooming process, small distortion and high resolution.

Description

technical field [0001] The invention relates to a wide-spectrum continuous zoom camera lens. Background technique [0002] In order to increase the monitoring capability, from day to night for full-time shooting, or long-distance fog penetration shooting, it is necessary for the optical system to have a wide-spectrum response imaging from visible light to near-infrared. The traditional zoom lens is to achieve confocal of visible light and near-infrared light. Confocal is usually achieved by thickness compensation of the two spectral band filters. In order to meet the development of imaging chips towards high pixels and small pixels, the optical lens should have high image quality, which generally complicates the structure and increases the number of components, such as adopting a structure of five components; or in the optical system Using an aspheric surface, but at the same time brings an increase in cost. Contents of the invention [0003] The purpose of the present i...

AI Technical Summary

Problems solved by technology

In order to meet the development of imaging chips towards high pixels and small pixels, the optical lens should have high image quality, which generally complicates the structure and increases the number of components, for example, adopting the structure of five components; or in the optical system Using an aspheric surface, but at the same time brings an increase in cost

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