冷屏结构与冷屏效率  

Structure and efficiency of cold shield

作　　者：尹爽[1] 徐世春[1] 高玲[1] 徐思轶 邓蔚 任海[1] 杨秀华[1] Yin Shuang;Xu Shichun;Gao Ling;Xu Siyi;Deng Wei;Ren Hai;Yang Xiuhua(Kunming Institute of Physics,Kunming 650223,China)

机构地区：[1]昆明物理研究所,云南昆明650223

出　　处：《红外与激光工程》2021年第3期99-104,共6页Infrared and Laser Engineering

摘　　要：红外探测器中,冷屏结构设计直接影响其杂散辐射抑制能力。为进一步提高冷屏效率,针对冷屏高度、外壳结构对冷屏杂散辐射抑制的影响进行分析。分析采用数学建模的方式,对计算结果与探测器组件测试结果进行比较,总结规律。当冷屏高度为25 mm,探测器组件测试结果为5.46%,当冷屏高度增高到29 mm,冷屏的非有效抑制杂散辐射结构和有效抑制杂散辐射结构组件测试结果分别为6.11%和4.87%。提出了一种冷屏结构设计的新思路,仅增加冷屏高度,不一定可以提高冷屏效率;挡光环有效抑制杂散辐射时,随着冷屏高度增高,杂散辐射抑制能力变强,冷屏效率随之增高,红外探测器性能有所改善,此时调整冷屏外壳结构不会影响冷屏效率。The cold shield structure has direct effects on stray lights suppressing in infrared detector.In order to further improve the cold shield efficiency,the cold shield height and containment structure influence on stray radiation suppressed were offered based on the analysis.Building mathematical models,DF20 cold shield was chosen as an instance to be calculated by the program.Compared with the test results of the infrared detector,when the cold shield height is 25 mm,the test result is 5.46%.When the cold shield height is 29 mm,the test result of cold shield which restraining the stray radiation effectively 4.87%,the test result of cold shield which restraining the stray radiation ineffectively 6.11%.A creative idea of cold shield structure design was proposed.Just increasing the cold shield height,may not increase the cold shield efficiency.When the baffles restrained the stray radiation effectively,with the cold shield hight increased,the stray radiation suppression capability became stronger,the cold shield efficiency increased,the infrared detector performance was improved.At the same time,changing the cold field structure will not influence the efficiency of the cold shield.

关 键 词：红外探测器冷屏 冷屏结构 冷屏效率 有效抑制 

分 类 号：O435[机械工程—光学工程]