Study on the Design of Prism Hyperspectral Imaging System Based on Off-Axis Two-Mirror Littrow Configuration
YANG Jin1, 2, CUI Ji-cheng1, Bayanheshig1, QI Xiang-dong1, TANG Yu-guo1*, YAO Xue-feng1
1. Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China 2. University of Chinese Academy of Sciences,Beijing 100049,China
Abstract:In order to meet the requirements of high spectral resolution and high image quality on the hyperspectral imaging system, and to meet the new demands of miniaturization, light weight, and high optical efficiency in practical applications, a prism known as hyperspectral imaging system based on Littrow configuration is designed. The use of off-axis two-mirror Littrow configuration is to reduce the size of the optical system and provide a collimated beam for the plane prisms. To avoid the optical path interference, the macro programming optimization is applied. The application of two correct lens and aspheric mirrors can correct the spectral smile and the keystone of the hyperspectral imaging system. It is indicated that the distortion is less than 2.1 μm and the spectral bend is less than 1.3 μm, both are controlled within 18% pixel. The analytical results indicate that the MTF in the visible-near infrared(VNIR) spectral region from 400 to 1 080 nm is above 0.9 while spectrum resolution is about 1.6~5.0 nm, the spectral transmittance more than 51.5%. The results show that the system has high transmittance and image quality within the whole spectral range.
杨 晋1, 2,崔继承1,巴音贺希格1,齐向东1,唐玉国1*,姚雪峰1. 基于离轴两反利特罗结构的棱镜高光谱成像系统的光学设计[J]. 光谱学与光谱分析, 2016, 36(05): 1537-1542.
YANG Jin1, 2, CUI Ji-cheng1, Bayanheshig1, QI Xiang-dong1, TANG Yu-guo1*, YAO Xue-feng1. Study on the Design of Prism Hyperspectral Imaging System Based on Off-Axis Two-Mirror Littrow Configuration. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(05): 1537-1542.