轻小型高分辨率星载高光谱成像光谱仪  

Small and high-resolution spaceborne hyperspectral imaging spectrometer

作　　者：樊星皓 刘春雨[1,3] 金光 刘帅[1,3] 谢运强[1,2,3] 徐婷婷[1,2,3] 冯钦评 王集 FAN Xing-hao;LIU Chun-yu;JIN Guang;LIU Shuai;XIE Yun-qiang;XU Ting-ting;FENG Qin-ping;WANG Ji(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Space-based Dynamic&Rapid Optical Imaging Technology,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033 [2]中国科学院大学,北京100049 [3]中国科学院天基动态快速光学成像技术重点实验室,吉林长春130033

出　　处：《光学精密工程》2021年第3期463-473,共11页Optics and Precision Engineering

基　　金：国家重点研发计划资助项目(No.2016YFB0501200)。

摘　　要：在小型化成像光谱仪的研制和应用中,如何同时实现轻量化、高地面分辨率和高信噪比是目前亟待突破的技术难题。本文通过将线性渐变滤光片分光技术和数字域时间延迟积分技术相结合,并对镜头进行紧凑化处理,设计了一款工作波段为403~988 nm、平均光谱分辨率为8.9 nm、系统总质量为7 kg的轻小型星载高光谱成像光谱仪。仿真和实验结果表明,该高光谱成像仪能在500 km轨道上得到刈幅宽度为50.5 km、地面分辨率为10 m的高光谱图像,且图像信噪比良好。该成像光谱仪可为微纳卫星获得高分辨率的高光谱图像提供技术支持,推动了我国高光谱遥感探测技术的发展。Currently,there is an urgent need for a small,high-resolution imaging spectrometer for remote sensing.According to the load requirements of the hyperspectral micro-nano satellite,this study combined a linear variable filter and digital TDI technology,and the lens was compacted and apochromatic in ZE⁃MAX.Consequently,a light and small spaceborne hyperspectral imaging spectrometer was designed with a working band of 403-988 nm,an average spectral resolution of 8.9 nm,and a total system mass of 7 kg.The simulation and experimental results show that the hyperspectral imaging spectrometer can achieve a high-ground-resolution hyperspectral image with a swath width of 50.5 km and a ground resolution of 10 m on a 500 km track,and the image signal-to-noise ratio is good.The imaging spectrometer combines the characteristics of low weight and high ground resolution,thereby aiding the development of hyperspectral micro/nano satellites.

关 键 词：成像光谱仪 高地面分辨率 复消色差 线性渐变滤光片 数字域TDI 

分 类 号：O433.1[机械工程—光学工程] TH744[理学—光学]