超光谱分辨率紫外双通道共光路成像光谱仪设计  

Hyperspectral resolution ultraviolet dual channel common optical path imaging spectrometer

作　　者：张璐[1,2] 李博 李寒霜[1] 顾国超 王晓旭[1] 邵英秋[1] 林冠宇[1,3] 叶新[1,3] ZHANG Lu;LI Bo;LI Han-shuang;GU Guo-chao;WANG Xiao-xu;SHAO Ying-qiu;LIN Guan-yu;YE Xin(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China;Innovation Center for FengYun Meteorological Satellite,Beijing 100081,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]许健民气象卫星创新中心,北京100081

出　　处：《中国光学（中英文）》2022年第5期1029-1037,共9页Chinese Optics

基　　金：黑土地保护与利用科技创新工程专项资助(No.XDA28050102);国家自然科学基金项目(No.62005268);国家重点研发计划项目资助(No.2018YFB0504600,No.2018YFB0504603);中国电波传播研究所稳定支持科研经费资助项目(No.A132001W03)。

摘　　要：针对超光谱分辨率成像光谱仪多通道探测需求,本文设计了一种超光谱分辨率紫外双通道共光路成像光谱仪。该成像光谱仪望远系统采用视场离轴的离轴三反结构,分光系统采用了具有小型轻量化优点的改进型Offner结构。通过对Offner光谱仪结构的理论推导,得出了满足超光谱分辨要求的双通道共光路Offner初始结构参数。为了提高成像光谱仪的成像质量,在Offner结构中引入弯月透镜,并对系统进行逐步优化。最终得到的双通道共光路成像光谱仪工作波段为280~300 nm和370~400 nm,在奈奎斯特频率为27.8 lp/mm时,双通道的调制传递函数(MTF)均优于0.8,全视场均方根半径(RMS)均小于9μm,光谱分辨率均优于0.1 nm。本文研究对天基超光谱探测成像光谱仪小型化、集成化设计具有重要意义。Based on the requirement of multichannel detection for hyperspectral resolution imaging spectrometer,we design a hyperspectral resolution ultraviolet dual channel common optical path imaging spectrometer whose telescopic system adopts an off-axis three mirror structure with an off-axis field of view,and whose spectroscopic system applies a modified small and light weight Offner structure.Through the theoretical analysis of Offner spectrometer structures,initial structural parameters of a dual channel common optical path Offner that met the requirements of hyperspectral resolution were achieved.In order to improve the imaging quality of the imaging spectrometer,meniscus lenses were introduced into Offner structure,and the system was gradually optimized.Eventually,a dual channel common optical path imaging spectrometer was obtained with operating bands of 280~300 nm and 370~400 nm.When the Nyquist frequency is 27.8 lp/mm,the modulation transfer function(MTF)of both channels is better than 0.8,the full field mean square root radius(RMS)is less than 9μm.and the spectral resolution is better than 0.1 nm.The design of this imaging spectrometer has important implications for the miniaturization and integration design of space-based hyperspectral detection imaging spectrometers.

关 键 词：Offner光谱成像系统 光学设计 超光谱分辨率 

分 类 号：TH744.1[机械工程—光学工程]