Camera lens with large relative aperture, strong fog penetrating capacity and ultralow veiling glare coefficient

Abstract

The invention relates to a camera lens with a large relative aperture, a strong fog penetrating capacity and an ultralow veiling glare coefficient. An optical system of the camera lens is provided with a front set A, a changeable diaphragm assembly B, a rear set C and a color filter conversion assembly D in the incidence direction of light rays in sequence, wherein the focal power of the front set A is positive, and the focal power of the rear set B is positive. The front set A is provided with a positive crescent lens A-1, a first gluing set and a second gluing set in sequence, wherein the first gluing set is formed by connecting a negative crescent lens A-2 and a biconvex lens A-3 in an airtight mode, and the second gluing set is formed by connecting a positive crescent lens A-4 and a biconcave lens A-5 in an airtight mode. The rear set C is provided with a biconvex lens C. The camera lens has high resolution power in the broadband spectrum range between 400 nm and 1000 nm, the relative aperture reaches 1:2, the veiling glare coefficient is smaller than 1 / 10000, monitoring of targets at middle and long distances can be achieved under the special weather conditions such as rainy days, snowy days and mist, false images generated under a high light target condition can be eliminated effectively through the ultralow veiling glare coefficient, and the monitoring capacity of the system is improved.

Description

technical field [0001] The invention relates to an optical camera device of photoelectric video technology, in particular to a camera lens with large relative aperture, strong fog penetration and ultra-low stray light. Background technique [0002] The existing conventional medium and long-distance monitoring camera lens has a small light aperture and a narrow response spectrum, that is, the wavelength λ of the visible light spectrum is small. In complex environments, especially in special weather such as rain, snow, and mist, light transmission In addition, under the conditions of strong light targets, it is easy to produce ghost images and seriously affect the monitoring ability of the system. Contents of the invention [0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a camera lens with large relative aperture, strong fog penetration, and ultra-low stray light, which is better than ordinary lenses under special condi...

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