Fixed non-refrigeration long wave infrared hybrid athermal lens and installation method thereof

Abstract

The invention relates to a fixed non-refrigeration long wave infrared hybrid athermal lens and an installation method thereof. The fixed non-refrigeration long wave infrared hybrid athermal lens comprises a front lens barrel and a rear lens barrel which are cooperatively elastically connected in an anterior-posterior direction, a positive focal lens A and a negative focal lens B which are successively arranged in the front lens barrel along a light ray incidence direction, and a positive focal lens C arranged in the rear lens barrel. The outer side wall of the front lens barrel is provided with a circular groove in a circumferential direction; an expansion ring is sleeved in the groove; the rear end of the front lens barrel and the front end of the rear lens barrel are in cooperative elastic connection through an elastic gasket; the front lens barrel and the rear lens barrel are both sleeved in an outer cover; the front lens barrel is in movable connection with the outer cover; the rear lens barrel is fixed on the rear side in the outer cover. The fixed non-refrigeration long wave infrared hybrid athermal lens has the beneficial effects of simple structure, compact dimension, light weight and high reliability, and realizes a stable lens maintenance image surface by utilizing the thermal characteristic difference among different materials, and through reasonably collocating positive and negative focal power.

Description

technical field [0001] The invention relates to the field of monitoring and security, in particular to a fixed uncooled long-wave infrared hybrid athermal lens and an installation method thereof. Background technique [0002] The long-wave infrared uncooled optical system has been widely used in both military and civilian fields, because the infrared lens has good anti-interference performance; it has a long distance at night; it has a strong ability to penetrate smoke, dust and haze; it can work all-weather and all-day; The advantages of multi-target panoramic observation, tracking and target recognition capabilities and good anti-target stealth capabilities have put forward higher and higher requirements for the imaging quality of the optical system. However, due to the thermal effect of infrared optical materials and mechanical materials, drastic changes in operating temperature will have a serious impact on the optical system, such as causing focal length changes, image ...

AI Technical Summary

Problems solved by technology

However, due to the thermal effect of infrared optical materials and mechanical materials, drastic changes in operating temperature will have a serious impact on the optical system, such as causing focal length changes, image plane drift, and image quality degradation.

Therefore, in order to adapt to different ambient temperatures, the infrared lens is required to have a certain temperature adaptive ability; in addition, most of the lenses on the market have complex structures, processing difficulty and high cost, so the lens is also required to have a simple structure, easy processing, and practical Strong, once the debugging is completed, there is no need to artificially adjust the intercept

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