热真空环境对空间外差光谱仪复原光谱的影响  

Influence of thermal-vacuum environment on the recovered spectrum of spatial heterodyne spectrometer

作　　者：叶擎昊 姜通[1] 代海山[1] 熊伟[2] 施海亮[2] 罗海燕[2] 

机构地区：[1]上海卫星工程研究所,上海200240 [2]中国科学院安徽光学精密机械研究所中国科学院通用定标与表征重点实验室,合肥230031

出　　处：《光电工程》2017年第7期710-718,共9页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(41605014)

摘　　要：热真空环境适应性是空间光学遥感仪器的关键性能之一,对超光谱CO_2监测仪的复原光谱精度尤为重要。基于空间外差干涉技术原理,采用理论分析和试验手段对仪器热真空环境适应性进行了讨论。理论分析了热真空环境对准直光束发散角、扩视场空间外差干涉仪组件基频波长、成像镜头离焦和缩放比等因素的改变对复原光谱的影响,并基于CS-800型热真空模拟设备开展了测量实验。实验结果表明,理论分析得到的系统基频波长与实验数据吻合,复原光谱廓线形状与理论分析一致。当干涉仪组件均采用融石英(SiLiCa),热控精度优于1.1℃时,仪器可具有0.01 nm的光谱稳定度,该分析为空间外差干涉光谱仪各功能组件的热控要求、地基常压条件下基频的选定等问题提供了理论依据。Thermal-vacuum environment adaptability is one of the key performances of space optical instruments,especially for hyper-spectral instrument, and spatial heterodyne spectrometer（SHS） should provide high spectral stability for the detection of atmosphere CO_2. Based on the research of the spatial heterodyne interference principle,simulation test in thermal-vacuum environment and quantitative analyses are carried out. The relationship among environment changes and the divergence half-angle of collimating lens, Littrow wavelength of field widened interferometer,different defocusing amount and pantograph ratio of imaging lens are analyzed. In order to verify the theoretical analysis, thermal-vacuum experiment is performed. The results show that the spectral deviation and profile are matched with theoretical analysis, and spectral stability is less than ±0.01 nm under the temperature from 19 ℃ to 21.2 ℃ by the substrates made of fused Silica（Corning 7980 0F）. Quantitative analyses provide theoretical basis for the thermal control requirement and Littrow wavelength selection in normal atmospheric pressure.

关 键 词：空间外差干涉光谱仪 热真空环境 基频波长 复原光谱 

分 类 号：TH744.1[机械工程—光学工程]