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《Opto-Electronic Engineering》 2017-07
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Influence of thermal-vacuum environment on the recovered spectrum of spatial heterodyne spectrometer

Qinghao Ye;Tong Jiang;Haishan Dai;Wei Xiong;Hailiang Shi;Haiyan Luo;Shanghai Institute of Satellite Engineering;Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences;  
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.
【Key Words】: spatial heterodyne spectrometer(SHS) thermal-vacuum environment littrow wavelength recovered spectrum
【Fund】: 国家自然科学基金资助项目(41605014)
【CateGory Index】: TH744.1
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