A large relative aperture staring surround view imaging infrared surveillance lens

Abstract

The invention discloses a large relative aperture staring surround view imaging infrared monitoring lens. The monitoring lens sequentially includes along the optical path: a convex reflector, a concave reflector, a meniscus negative lens 1, a meniscus negative lens 2, a diaphragm, Bi-convex lens, meniscus negative lens three and infrared detector. The infrared monitoring lens disclosed by the present invention is based on the principle of planar cylindrical projection and adopts a catadioptric optical system configuration to realize staring surrounding infrared imaging in the range of a horizontal field of view of 360° and a pitch field of view of 5° to 45°. It solves the problem that the single-lens field of view coverage is small, and large-area monitoring cannot be realized. Through theoretical calculation and analysis of reflective and refractive optical systems, the initial configuration of the optical system is determined, and the aberration of the optical system is optimized by optimizing the lens curvature radius, lens spacing, matching of different optical materials and adopting aspheric surface type, so that the image quality can reach optimal.

Description

technical field [0001] The invention belongs to optical technology, in particular to a large relative aperture staring surround view imaging infrared monitoring lens. Background technique [0002] Infrared surveillance lens is a kind of thermal imaging that works in the long-wave infrared band (8-12 μm) and uses the difference and difference in the radiation temperature of different objects in the scene. It can work in day and night and in adverse weather conditions such as fog, haze, smog, and dust. , can greatly expand the visual performance of the human eye. [0003] Infrared surveillance lens work concealed, reliable, good environmental adaptability. It has been rapidly developed and widely used in many civil and military monitoring fields such as coal mine fire point warning, forest fire prevention, warehouse key area monitoring, community security, border intrusion, and waterway safety monitoring. [0004] The field of view of the existing long-wave infrared monitori...

AI Technical Summary

Problems solved by technology

[0004] The field of view of the existing long-wave infrared monitoring lens is within 40°. For large-scale area monitoring, it is usually necessary to arrange multiple monitoring lenses to achieve complete coverage, and the image is displayed on multiple screens, which may cause monitoring Blind spots, expensive equipment

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