Performance Comparison of Long-Wave Infrared Imaging Spectrometer Between Dyson Form and Offner Form  

作　　者：Jiayin Sun Ying Liu Qiang Sun Chun Li Jian Wang Yang Jiang 

机构地区：[1]Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Jilin 130033,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2017年第2期45-50,共6页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National High Technology Research and Development Program of China(863 Program)(Grant No.2013AA03A116)

摘　　要：In view of the difficulties in traditional long-wave infrared imaging spectrometer which is hard to realize a high signal-to-noise ratio and miniaturization as well under the weak remote sensing signal,Offner convex grating spectrometer and Dyson concave grating spectrometer,both having concentric structure,are designed and analyzed in the band of 8-12 μm. The diffraction angle expressions of the two spectrometers are obtained and the diffraction characteristics are acquired. Both of the spectrometers are designed in Zemax environment under different F-numbers and different grating constants with the same slit,spatial resolution,spectral resolution and detector. The results show that Dyson grating spectrometer possesses the advantages of higher throughput and smaller volume, and Offner grating spectrometer possesses the advantage of more accessible material and the absence of chromatic aberration. The differences between Dyson form and Offner form show that the former is a better choice in the long-wave infrared imaging spectrometer.In view of the difficulties in traditional long-wave infrared imaging spectrometer which is hard to realize a high signal-to-noise ratio and miniaturization as well under the weak remote sensing signal, Offner convex grating spectrometer and Dyson concave grating spectrometer, both having concentric structure, are designed and analyzed in the band of 8-12μm. The diffraction angle expressions of the two spectrometers are obtained and the diffraction characteristics are acquired. Both of the spectrometers are designed in Zemax environment under different F-numbers and different grating constants with the same slit, spatial resolution, spectral resolution and detector. The results show that Dyson grating spectrometer possesses the advantages of higher throughput and smaller volume, and Offner grating spectrometer possesses the advantage of more accessible material and the absence of chromatic aberration. The differences between Dyson form and Offner form show that the former is a better choice in the long-wave infrared imaging spectrometer.

关 键 词：long-wave infrared imaging spectrometer grating constant concentric configuration 

分 类 号：O435.1[机械工程—光学工程] TN214[理学—光学]