光谱学与光谱分析, 2017, 37 (7): 2267, 网络出版: 2017-08-30
一种Offner型小型短波红外成像光谱仪
Design of a SWIR Offner Imaging Spectrometer
成像光谱仪 短波红外 光学设计 凸面光栅 光谱分辨率 波长定标 Imaging spectrometer SWIR Optical design Convex grating Spectral resolution Spectral calibration
摘要
通过对Offner分光光学系统分析, 给出了快速计算初始结构参数公式, 根据算得的初始结构参数优化出一套适用于短波红外(1 000~2 500 nm)的分光光学系统, 设计的光学系统相对孔径大(F/#22)、 光谱分辨率高(优于10 nm)和入射狭缝长(12 mm), 在整个波长和视场范围内调制传递函数MTF均大于05。 完成的成像光谱仪整机体积小, 重量轻(小于5 kg), 仪器测试结果表明, 全光谱范围内光谱线性好, 光谱标定后波长精度优于4 nm, 通过对不同波段分辨率测试, 全波长范围内光谱分辨率与设计相符, 动态成像实验表明, 光谱图像清晰并且光谱数据质量佳。
Abstract
By analyzing the offner spectroscopic optical system, an equation to calculate quickly the initial structural parameters is summed . Based on the calculated initial structural parameters we optimized a set of spectral optics used for short-wave infrared (1 000~2 500 nm), which has been designed with large optics aperture (F/# 22), high spectral resolution (better than 10 nm) and long entrance slit (12 mm).Within the entire field of view and wavelength, the modulation transfer function MTF is greater than 05.The complete imaging spectrometer with smaller size and light weight (less than 5 kg). The instrument test results show that the spectral linearity over the whole spectral range is good, and after spectral calibration the wavelength accuracy is more than 4 nm. The resolution tests of different bands shows that the spectral resolution over the full wavelength range is consistent with the design, and dynamic imaging experiments show that the spectral images are clear and the spectral data has good quality.
郑志忠, 杨忠, 修连存, 董金鑫, 陈春霞, 高扬, 俞正奎. 一种Offner型小型短波红外成像光谱仪[J]. 光谱学与光谱分析, 2017, 37(7): 2267. ZHENG Zhi-zhong, YANG Zhong, XIU Lian-cun, DONG Jin-xin, CHEN Chun-xia, GAO Yang, YU Zheng-kui. Design of a SWIR Offner Imaging Spectrometer[J]. Spectroscopy and Spectral Analysis, 2017, 37(7): 2267.