一种新型红外多波段低背景探测技术

A novel technology on infrared multi-band low-background detection

红外低背景探测技术主要应用在深空环境,系统灵敏度与自身背景辐射关系较大,如何有效抑制探测系统自身背景辐射一直是重点研究方向;识别一直是红外领域的研究热点,增加探测谱段是提高特征获取量的最有效方式。介绍了一种局部制冷分光的红外多波段探测技术,该技术采用探测器一体化设计思路,将折反结构光学系统局部集成到探测器内部随红外芯片一起制冷;再利用分光元件进行双路分光,实现双波段能力,如果结合叠层芯片可以有效拓展到多波段能力;通过光学自辐射仿真,比较不同光学结构形式下的自辐射结果,可以看出:该技术背景辐射降低至常温折反系统背景辐射1/4,理论灵敏度可以大幅度提高,该技术优势明显,潜力巨大。

Infrared low-background detection technology is mainly used in space environment,the sensitivity of detection system has a gret relationship with the background radiation of detection system.How to effectively suppress the background radiation of detection system has always been the important research direction.And recognition has been a research hotspot in infrared field,adding the detection spectrum is the most effective way to get the features of target.An infrared multi-band detection technology based on optical lens local refrigeration and optical spiltter was introduced.Firstly,adopting the idea of integrated design with optical system and detector,integrate local optical system into the infrared detector and refrigeration with infrared FPA,then dividing the two lights by optical spiltter,which achieved dual-band ability,if the dual-band FPA was used in the future,the system can have the multi-band ability.Comparing the results of self-radiation under different optical types by the simulation of optical self-radiation,it can be seen that the background radiation of this technology is reduced to 1/4 of the ordinary temperature optical system,the sensitivity has also been greatly improved.This technology has obvious advantages and great potential.