Snapshot Diffractive Optic Image Spectrometer: An Innovative Design for Geostationary Hyperspectral Imaging

Abstract

Geostationary Orbit (GEO) staring imaging technology is an important field of aerospace remote sensing technology research. In this Letter, an efficient method and system for hyperspectral imaging of geosynchronous orbit is realized by fusing diffractive optic and light field imaging technology. Large scale axial scanning of diffractive optic image spectrometer (DOIS) limits its application in GEO satellite. The emergence of the light field imaging technology provides a perfect solution for DOIS. Our system is a snapshot spectrometer that project the spectral and spatial information simultaneously onto a CCD detector. Here a spectrometer system that operates in the visible near infrared band is designed and the performance of the system is analyzed and evaluated. Experiments are shown to illustrate the performance improvement attained by the new model. Our analysis shows that the novel snapshot hyperspectral diffractive optic image spectrometer is a high resolution, compact, economical, rugged, programmable, hyperspectral imager that can be widely built for visible near infrared detection camera and high sensitivity astronomy satellite in GEO orbit and other fields.