基于中阶梯光栅的光谱定标装置设计方法

针对紫外-可见光波段高光谱成像仪光谱定标装置的设计进行研究，论述了中阶梯光栅的光学原理，根据光谱定标原理，利用中阶梯光栅工作角度大、衍射级次高、光谱分辨率高的优点，建立了基于中阶梯光栅的光谱定标装置，提出了基于中阶梯光栅的光谱成像仪光谱定标装置的设计方法。以大气探测卫星Aura 上所搭载的臭氧观测仪为例论述了光谱定标装置的设计过程，仿真分析了光谱定标装置带宽对光谱定标精度的影响，给出了衍射级次、光谱分辨率、平行光管焦距等光谱定标装置主要性能参数的设计计算方法，为基于中阶梯光栅的光谱成像仪光谱定标装置的设计提供了依据。

Method of designing spectral calibration equipment based on echelle

Design method of spectral calibration device for ultraviolet-visible band hyperspectral imager was studied. The optical principle of echelle grating was discussed. According to the theory of spectral calibration and taking the advantages of large working angle, high diffraction order and high spectral resolution of echelle grating, a spectral calibration equipment based on echelle grating was founded. Design method of spectral calibration device based on echelle grating for hyperspectral imager was proposed. Taking the ozone monitoring instrument (OMI) carried on Aura satellite as an example, the design process of spectral calibration device was discussed. The spectral calibration device bandwidth effect on the precision of spectral calibration was analysed by simulation. The calculation methods of the main performance parameters of spectral calibration device such as the diffraction order, spectral resolution of grating and the focal length of collimator were given, providing the design basis of spectral calibration device based on echelle grating.