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热红外谱段是对地观测高光谱遥感中非常有用的波段,受限于技术发展,热红外谱段的高光谱成像系统在国内的空间光电系统中并不多见,近年来在国家相关部门的支持下发展迅速,取得了较大进展。结合“十二五”期间研制的机载热红外高光谱成像仪系统,建立了信号流模型,对系统背景辐射进行了建模仿真,并对红外焦平面组件等效暗电流进行了分析测量,在此基础上得出了影响系统的探测灵敏度的关键因素,给出了系统设计低温光学100K制冷的设计依据。机载热红外高光谱成像仪研制完成后,还进行了探测灵敏度实际测量并与仿真结果进行了对比分析,对未来进一步发展热红外高光谱成像技术积累了重要数据。
The thermal infrared spectrum is a very useful band for the observation of hyperspectral remote sensing in the earth. Due to the technical development, the hyperspectral imaging system of the thermal infrared spectrum is rare in the domestic space photovoltaic system. In recent years, Has made rapid progress with great progress. Combined with the airborne thermal infrared hyperspectral imager system developed during the 12th Five-Year Plan period, a signal flow model was established to simulate the background radiation of the system and the equivalent dark current of the infrared focal plane module was analyzed Based on this, the key factors influencing the detection sensitivity of the system are obtained, and the design basis of low temperature optical 100K refrigeration system design is given. After the development of the airborne thermal infrared hyperspectral imager, the actual measurement of detection sensitivity was also carried out and compared with the simulation results, which accumulated important data for the further development of thermal infrared hyperspectral imaging technology in the future.