星载多普勒差分干涉仪杂散光特性与抑制  

Stray Light Characteristics and Suppression in Space-borne Doppler Asymmetric Spatial Heterodyne Interferometer

作　　者：李俊杰 孙剑[1] 赵珩翔 畅晨光 傅頔 赵昊 白璐 冯玉涛[1] LI Junjie;SUN Jian;ZHAO Hengxiang;CHANG Chenguang;FU Di;ZHAO Hao;BAI Lu;FENG Yutao(Xi′an Institute of Optics Precision Mechanic of Chinese Academy of Sciences,Xi′an 710119,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Physics and Optoelectronic Engineering,Xidian University,Xi′an 710071,China)

机构地区：[1]中国科学院西安光学精密机械研究所,西安710119 [2]中国科学院大学,北京100049 [3]西安电子科技大学物理与光电工程学院,西安710071

出　　处：《光子学报》2022年第11期243-254,共12页Acta Photonica Sinica

基　　金：国家自然科学基金(No.41005019);中国科学院西部青年学者(No.XAB 2016A07);中国科学院西部之光交叉团队(No.E1294301);陕西省自然科学基础研究计划(No.2019JQ-931)。

摘　　要：星载多普勒差分干涉仪通过探测气辉光谱测量中高层大气风场,为降低低层大气背景辐射的影响,需要设计杂散光抑制结构。以基于500 km轨道高度的卫星平台对60~90 km高度的中层大气风场探测为例,选取典型气辉辐射强度与大气背景辐射,依据不同高度下大气背景辐射强度变化,结合光学系统参数设计遮光罩。仿真分析多普勒差分干涉仪系统内部产生杂散光的关键面,设计杂光抑制结构,并评估干涉仪非工作级次能量对成像造成的影响。点源透过率分析和像面照度仿真结果表明:水平方向和对角线方向上,视场外0.2°处点源透过率下降到10^(-5)以下,竖直方向上,视场外0.04°处点源透过率下降到10^(-5)以下;大气背景辐射和鬼像占像面总能量的1.35%。所提杂散光抑制方法满足星载多普勒差分干涉仪对杂散光抑制的技术要求。Wind detection in middle and upper atmosphere is an important way to characterize atmospheric environment and atmospheric dynamics,which is significant for accurate weather forecast and smooth operation of aerospace missions.Satellite remote sensing of the atmospheric wind field is not limited by weather and geographical conditions,and can be used for global all-weather remote sensing observation.More importantly,using limb viewing geometry can provide long-term observation results of the global horizontal wind field and temperature distribution,which is necessary for studying large-scale and longterm space climate.Compared with Michelson interferometer and Fabry-Perot interferometer,the Doppler asymmetric spatial heterodyne interferometer has higher sensitivity,no moving parts and lower processing accuracy requirements.These advantages can greatly improve the performance of the system,and are very suitable for wind field detection activities in the middle and upper atmosphere.The space-borne wind interferometer is designed to detect the weak airglow emissions employing limb viewing geometry,which can be easily affected by background radiation from the lower atmosphere.The earth′s atmosphere is composed of a variety of gases and aerosol particles.These components enable the atmosphere to absorb and scatter the incident solar radiation,which constitutes the atmospheric background radiation.The stray light will degrade the quality of the original interferogram data,decreasing the contrast and effective signalto-noise ratio.This paper uses a satellite based on 500 km orbital altitude to measure the winds in the middle atmosphere at the height of 60~90 km,and the typical atmospheric background radiation and airglow radiation intensity are selected.The detection range of the above loads is in the upper atmosphere,and the observation of wind field in the middle atmosphere(60~90 km) will put forward higher requirements for the suppression of stray light.In addition,the multistage diffraction energy of Doppler interfer

关 键 词：应用光学 杂散光抑制 遮光罩设计 多普勒差分干涉仪 大气背景辐射 

分 类 号：TH744[机械工程—光学工程]