An uncooled optical athermalized lens

Abstract

The invention discloses a non-refrigeration optical athermalization lens, a negative crescent lens, a positive crescent lens and a positive lens are arranged in sequence along a light incidence direction, and an effect that an object can be clearly imaged in a range of -40 degrees to +60 degrees without focusing is achieved through adjustment of an F number and the focal length of each lens.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to an uncooled optical athermalized lens. Background technique [0002] In recent years, with the continuous development of uncooled detector technology, the sensitivity of uncooled detectors has been continuously improved, and the cost has been continuously reduced, making infrared imaging systems widely used in night vision, vehicle night vision and security monitoring. more and more widely. However, one disadvantage of infrared imaging systems is that it is difficult to adapt to a wide operating temperature range. Since the temperature coefficient of refractive index of infrared materials varies greatly, as the ambient temperature changes, the refractive index of infrared optical materials, the curvature, thickness and spacing of components will change, and the thermal expansion and contraction of the shell will make the system Defocus and other aberrations will seriously affe...

AI Technical Summary

Problems solved by technology

[0003] In view of the above analysis, the present invention aims to provide a compact uncooled optical athermalization lens to solve the problem that temperature affects the imaging quality of infrared imaging systems in the prior art

Images