MWIR Snapshot Imaging Spectrometer: Calibration and Imaging Experiments; Complete Imaging Stokes Polarimeter for The 3 - 5 Micrometer Spectral Band

摘要

We report results of experimentation with a new, high-resolution MWIR non-scanning, snapshot imaging spectrometer capable of simultaneously recording spatial and spectral data from a rapidly varying target scene. The instrument is based on computed tomography concepts and operates in a mid-wave infrared band of 3.0 to 5.0 micrometer. High speed spectral imaging was demonstrated by collecting spectro-spatial snapshots of filtered blackbodies, combustion products and targets of opportunity in the lab. Raw images were recorded using a 512 x 512 InSb focal plane array in snapshot mode. In addition, a complex Stokes imaging polarimeter for the 3-5 micrometer band has been constructed and tested. The system features a rotatable form-birefringent retarder, wire grid polarizer and a 512 x 512 InSb array. Design considerations are discussed and results of experiments with man-made and natural targets are presented.