Spectral Calibration Method for All-Reflected Fourier TransformImaging Spectrometer

摘要

All-Reflected Fourier Transform Imaging Spectrometer (ARFTIS) is a novel type of instrument based on Fouriertransform spectroscopy. ARFTIS will offer high luminous flux and high spectral resolution, well suited to remote sensingwith low energy. But there is nearly not any method of convenient spectrum calibration for this kind of instrument. Inthis paper, we analyze the spectrum calibration principle of ARFTIS and the cause of the calibration error. We reachedthe result that the calibration error is getting bigger with the increase of spectrum peak wavelength of the calibration light.By these we develop three convenient spectrum calibration methods used in Visible/Near-Infrared waveband, which arethe Monochromatic Method, the Average Method and the Weighted Average Method respectively. We apply thesemethods to ARFTIS calibrate experiment. According to the experiment results, The Monochromatic Method cancalibrate by using only one group of data, but with a little lower calibration precision. However the Weighted AverageMethod can provide a higher calibration precision than the other two methods. So, the Monochromatic method and theWeighted Average Method both have good application value for ARFTIS calibration.