Research on Small-Type and High-Spectral-Resolution Grating Monochromator
YANG Zeng-peng1, 2, TANG Yu-guo1, Bayanheshig1, CUI Ji-cheng1, YANG Jin1
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：Monochromator is the necessary equipment for spectral imager to calibrate the spectrum continuously. In order to calibrate the hyperspectral imaging spectrometer continuously, a small-type and high-spectral-resolution grating monochromator is designed. The grating monochromator with horizontal Czerny-Turner structure is designed with high-spectral-resolution as a starting point, and the design idea is discussed in detail from choosing the grating, calculating the focal length, the sizes of entrance slit and exit slit, among others. Using this method, the necessary structure parameters are determined, and the impact of the necessary structure parameters for spectral resolution and volume is given. According to the optical characteristics of the grating monochromator, the mechanical structures of the instrument are designed for small and handy from the components of the entrance slit, the collimator lens and imaging objective lens, the scanning structures, the fuselage and so on. The relationship of the sine mechanism parameters for output wavelength and wavelength scanning accuracy is given. The design and adjustment of the instrument are completed. The visible spectrums of mercury lamp are used as calibration lines, and the calibration curve is acquired by using least square method. This paper gives a method that combining the limit error of the step number and the calibration curve to evaluate the wavelength repeatability and wavelength precision. The datum of experiment shows that the spectral resolution of the instrument is better than 0.1 nm in the wavelength band from 400 to 800 nm. Simultaneously the wavelength repeatability reach to ±0.096 6 nm and the precision reach to ±0.096 9 nm.
杨增鹏1, 2，唐玉国1，巴音贺希格1，崔继承1，杨 晋1 . 小型高光谱分辨率光栅单色仪的研制 [J]. 光谱学与光谱分析, 2016, 36(01): 273-278.
YANG Zeng-peng1, 2, TANG Yu-guo1, Bayanheshig1, CUI Ji-cheng1, YANG Jin1 . Research on Small-Type and High-Spectral-Resolution Grating Monochromator. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(01): 273-278.
