Study on Coaxial Linear Dispersion Triplet Prisms of Wide Spectral Imaging Spectrometer
LIU Bing1, 2, LIU Ying1, ZHANG Xiao-long3, LI Can1, WANG Jian1, LI Chun1*, SUN Qiang1
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 3. Qingdao Binhai University, Qingdao 266555, China
Abstract：To overcome the difficulties of complex structure and serious nonlinear dispersion in prismatic imaging spectrometer the coaxial linear dispersion prismatic imaging spectrometer is investigated in this paper. A mathematical model of symmetric triple prisms’ beam splitting system is constructed with prism’s dispersion equation, and the prisms assemble of direct view is obtained. Then the factors affecting dispersion linearity are analyzed. The refractive index and dispersion rate of prism material impact dispersion linearity most while the influence of incident angle is very small. The way to improve dispersion linearity is given and the refractive index condition meeting the requirement of dispersion linearity of prisms is obtained. It provides important basis to select the initial structure for coaxial linear dispersion triplet prisms of imaging spectrometer. On condition that the working band of 400~1 000 nm, center wavelength deviation angle 0°, the maximum dispersion angle 0.6°, object numerical aperture 0.15 and spectral resolution 5 nm, we succeed in designing coaxial linear dispersion triplet prisms. Digital simulation with ZEMAX is performed, and the results are in accordance with theoretical analysis.
刘 兵1, 2，刘 英1，张晓龙3，李 灿1，王 健1，李 淳1*，孙 强1. 宽谱段共光轴线色散成像光谱仪三棱镜分光系统设计[J]. 光谱学与光谱分析, 2016, 36(05): 1543-1548.
LIU Bing1, 2, LIU Ying1, ZHANG Xiao-long3, LI Can1, WANG Jian1, LI Chun1*, SUN Qiang1. Study on Coaxial Linear Dispersion Triplet Prisms of Wide Spectral Imaging Spectrometer. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(05): 1543-1548.
