Radiometrie calibration of hyperspectral imaging spectrometer based on AOTF

Different from traditional imaging spectrometer, Acousto -optic Tunable Filter (AOTF) hyperspectral imaging spectrometer is based on the principle of acoustooptic modulation, and it acquires space and spectral information of each band on image plane. Because of its light splitting principle and its particularity of device performance, radiometric calibration method is not sophisticated yet, and the precision and long -term stability of radiometric calibration technology can not meet the need of the remote sensing application. By combining AOTF hyperspectral imaging spectrometer's characteristics and its requirement on radiometric calibration, a calibration method was put forward based on the detector and data pre -process algorithm was improved, and the precision of radiometric calibration was analyzed. Experimental result shows that the calibrated imaging spectrometer can truthfully reflect the information of ground object, and effectively improve the information quantification standard of imaging spectrometer.