We report results from a demonstration of a midwave-infrared, nonscanning, high-speed imaging spectrometer capable of simultaneously recording spatial and spectral data from a rapidly varying target scene. We demonstrated high-speed spectral imaging by collecting spectral and spatial snapshots of blackbody targets and combustion products. The instrument is based on computed tomography concepts and operates in a midwave-infrared band of 3.0–5.0 µm. We record raw images at a frame rate of 60 frames/s, using a 512 × 512 InSb focal-plane array. Reconstructed object cube estimates were sampled at 46 × 46 × 21 (x, y, λ) elements, or 0.1-µm spectral sampling. Reconstructions of several objects are presented.
© 2001 Optical Society of America
Original Manuscript: December 13, 2000
Revised Manuscript: May 21, 2001
Published: September 1, 2001
Curtis E. Volin, John P. Garcia, Eustace L. Dereniak, Michael R. Descour, Tom Hamilton, and Robert McMillan, "Midwave-infrared snapshot imaging spectrometer," Appl. Opt. 40, 4501-4506 (2001)