Low-distortion, broadband-spectrum and high-definition wide-angle aerial shooting monitoring lens and imaging method thereof

Abstract

The invention relates to a low-distortion, broadband-spectrum and high-definition wide-angle aerial shooting monitoring lens. The low-distortion, broadband-spectrum and high-definition wide-angle aerial shooting monitoring lens comprises a front lens group A, a variable diaphragm B, a rear lens group C and a color filter D which are sequentially arranged along an incidence direction of a light rayfrom left to right, wherein the front lens group A comprises a positive crescent lens A-1, a negative crescent lens A-2, a negative crescent lens A-3, a dual-convex lens A-4, a dual-concave lens A-5,a positive crescent lens A-6 and a dual-convex lens A-7 which are sequentially arranged along the incident direction of the light ray from left to right, and the rear lens group C comprises a dual-convex lens C-1, a dual-concave lens C-2, a dual-convex lens C-3 and a dual-convex lens C-4 which are sequentially arranged along the incident direction of the light ray from left to right. The invention also relates to an imaging method of the low-distortion, broadband-spectrum and high-definition wide-angle aerial shooting monitoring lens. Eleven full-spherical lenses are used, the low-distortion,broadband-spectrum and high-definition wide-angle aerial shooting monitoring lens has a compact optical structure, the full-field angle is larger than 84 degrees, the distortion is smaller than 2%, the optical resolution is high, and the low-distortion, broadband-spectrum and high-definition wide-angle aerial shooting monitoring lens is adaptive to a high-definition camera with pixels beings 12 millions, is favorable in visual light and near-infrared band imaging and is suitably used for monitoring sea lane in a large range.

Description

technical field [0001] The invention relates to a low-distortion wide-spectrum high-definition wide-angle aerial photography monitoring lens and an imaging method thereof. Background technique [0002] A photographic lens with a shorter focal length than a standard lens and a larger field of view than a standard lens is generally called a wide-angle lens. Due to its large field of view, it can capture a larger area of ​​the scene and is widely used in vehicles, security monitoring and other fields. The focal length and large field of view also bring defects such as large distortion, poor image quality at the edge of the image plane, serious image distortion and distortion, low resolution, and large size. In order to solve the above defects, currently such lenses generally use multiple aspheric surfaces or a mixture of glass, plastic and aspheric surfaces, but the processing of aspheric surfaces of this type of lens is difficult and expensive. Contents of the invention [...

AI Technical Summary

Problems solved by technology

[0002] A photographic lens with a shorter focal length than a standard lens and a larger field of view than a standard lens is generally called a wide-angle lens. Due to its large field of view, it can capture a larger area of ​​the scene and is widely used in vehicles, security monitoring and other fields. The focal length and large field of view also bring defects such as large distortion, poor image quality at the edge of the image plane, serious image distortion and distortion, low resolution, and large volume.

In order to solve the above defects, such lenses generally use multiple aspheric surfaces or a mixture of glass, plastic and aspheric surfaces, but the aspherical surface processing of this type of lens is difficult and expensive

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