Acousto -optic tunable filter based spectral imaging technology

A new imaging spectrometer based on AOTF was presented. AOTF is a new spectrum device which can diffract very narrow band of light from white incident light.Compared with conventional spectrometer,AOTF based imaging spectrometer had characteristic in mechanism and instrument design. By analyzing the working principle, diffraction mode and parameters index of AOTF,an AOTF based spectral imaging system was bulit.Spectral was calibrated using standard monochromatic source.Then,several outdoor experiments had been carried out to validate its function. For example, the spectral performance of the instrument had been measured by FieldSpec Pro FR from Analytical Spectral Devices.Vegetation spectrum from 550-1 000 nm was obtained through empirical line calibration method with the imaging spectrometer. Measurement results show accordant spectrum with FieldSpec Pro FR,and the imaging spectrometer can meet the requirement of hyperspectral imaging.