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.