适用于无人机搭载的轻小型成像光谱仪光学系统设计  

Optical system design of light and compact imaging spectrometer for unmanned aerial vehicles

作　　者：李亮亮 李新[2] 张允祥 张权 LI Liangliang;LI Xin;ZHANG Yunxiang;ZHANG Quan(College of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei 230601,China;Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]安徽建筑大学机械与电气工程学院,安徽合肥230601 [2]中国科学院安徽光学精密机械研究所,中国科学院通用光学定标与表征技术重点实验室,安徽合肥230031

出　　处：《量子电子学报》2024年第5期713-728,共16页Chinese Journal of Quantum Electronics

基　　金：中国科学院合肥物质科学研究院院长基金(YZJJ202208-CX);国家自然科学基金(42105139)。

摘　　要：设计了一种适用于无人机搭载的轻小型成像光谱仪(Light and compact imaging spectrometer,LCIS)光学系统。该光学系统的工作波段覆盖400~1000 nm,F数为3.3,视场大小为11°,光谱分辨率优于3 nm。采用Zemax对该光学系统进行仿真和优化,优化结果表明,点列图均方根(RMS)半径最大值为4.221μm,小于单个像元尺寸的一半,谱线弯曲最大值为1.30μm,色畸变最大值为1.16μm,分别占像元尺寸的8.69%和7.73%,在33 lp/mm处的调制传递函数(MTF)值优于0.7,各项指标评价结果均表明该光学系统具有较好的成像质量。此外,该光学系统体积为190 mm×160 mm×90 mm,表明该系统不仅光谱分辨率高、成像质量好,还具有体积小、结构紧凑的优点。本研究为轻小型成像光谱仪的研制提供了核心技术支持,为基于无人机搭载成像光谱仪开展遥感器在轨辐射定标工作奠定了基础。A light and compact imaging spectrometer(LCIS)optical system suitable for unmanned aerial vehicles(UAV)is designed in this work.The operating wavelength of the optical system covers 400-1000 nm,with an F number of 3.3,a field of view of 11º,and a spectral resolution better than 3 nm.The optical system is simulated and optimized using Zemax software.The optimization results show that the maximum root mean square(RMS)radius of the dot plot for this system is 4.221μm,which is less than half of the size of a single pixel,the maximum values of smile and keystone are 1.30μm and 1.16μm respectively,accounting for 8.69%and 7.73%of a single pixel size,and the modulation transfer function(MTF)value at 33 lp/mm is better than 0.7.All evaluation results show that the optical system has good imaging quality.In addition,the optical system has a volume of 190 mm×160 mm×90 mm,indicating that the system not only has high spectral resolution and good imaging quality,but also has the advantages of small size and compact structure.This research provides core technical support for the development of light and compact imaging spectrometer,and also lays a foundation for in-orbit radiometric calibration of remote sensors based on UAV borne imaging spectrometer.

关 键 词：光学设计 成像光谱仪 凸面光栅 光学系统 

分 类 号：TP7722.4[自动化与计算机技术—检测技术与自动化装置]