复合光学系统杂散辐射分析及抑制  

Stray radiation analysis and suppression of composite optical system

作　　者：韩星[1] 吴含笑 王泷仪 HAN Xing;WU Hanxiao;WANG Longyi(Tianjin Jinhang Institute of Technical Physics,Tianjin 300308,China)

机构地区：[1]天津津航技术物理研究所,天津300308

出　　处：《应用光学》2019年第1期1-6,共6页Journal of Applied Optics

基　　金：国家重大专项民用部分资金资助

摘　　要：以双谱段光谱仪为例,针对前端为卡塞格林结构形式的复合光学系统,设计了一种杂散辐射抑制装置。该装置含有外遮光罩1、外遮光罩2和2个内遮光罩,其中外遮光罩2有效地阻挡了直接进入光学系统的外杂散光。该装置可抑制各谱段的杂散辐射,其中可见光支路杂散辐射抑制后的杂光PST与信号光PST相差7～8个数量级,近红外支路杂散辐射抑制后的杂光PST与信号光PST相差5～6个数量级。该装置可提高光谱仪工作时段,性能稳定有效,且系统图像不受杂散光影响。Taking a dual-band spectrometer as an instance,a stray radiation suppression device was designed for a compound optical system which began with a Cassegrain structure.The device contains outer baffle 1,outer baffle 2 and two inner baffles,in which the baffle 2 efficiently blocks the external stray radiation directly into the optical system.The device can effectively suppress the stray radiation of each spectrum,and with this device,the difference between parasitic light and signal light in visible branch are 7~8 orders of magnitude,which in near infrared branch are 5~6 orders of magnitude.In practical,the device performs well as the image is not affected by the stray radiation,as well as,the working time can be enlarged.

关 键 词：光谱仪 复合光学系统 杂散辐射分析 

分 类 号：TN731.4[电子电信—电路与系统]