Towards HyTES: an airborne thermal imaging spectroscopy instrument

William R. Johnson; Simon J. Hook; Pantazis Mouroulis; Daniel W. Wilson; Sarath D. Gunapala; Cory J. Hill; Jason M. Mumolo; Vincent Realmuto; Bjorn T. Eng

doi:10.1117/12.826416

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18 August 2009 Towards HyTES: an airborne thermal imaging spectroscopy instrument

William R. Johnson, Simon J. Hook, Pantazis Mouroulis, Daniel W. Wilson, Sarath D. Gunapala, Cory J. Hill, Jason M. Mumolo, Vincent Realmuto, Bjorn T. Eng

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Proceedings Volume 7457, Imaging Spectrometry XIV; 745706 (2009) https://doi.org/10.1117/12.826416
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

An airborne thermal hyperspectral imager is underdevelopment which utilizes the compact Dyson optical configuration and quantum well infrared photo detector (QWIP) focal plane array. The Dyson configuration uses a single monolithic prism-like grating design which allows for a high throughput instrument (F/1.6) with minimal ghosting, stray-light and large swath width. The configuration has the potential to be the optimal imaging spectroscopy solution unmanned aerial vehicles (UAV) due to its small form factor and relatively low power requirements. The planned instrument specifications are discussed as well as design trade-offs. Calibration testing results (noise equivalent temperature difference, spectral linearity and spectral bandwidth) and laboratory emissivity plots from samples are shown using an operational testbed unit which has similar specifications as the final airborne system. Field testing of the testbed unit was performed to acquire plots of emissivity for various known standard minerals (quartz). A comparison is made using data from the ASTER spectral library.

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William R. Johnson, Simon J. Hook, Pantazis Mouroulis, Daniel W. Wilson, Sarath D. Gunapala, Cory J. Hill, Jason M. Mumolo, Vincent Realmuto, and Bjorn T. Eng "Towards HyTES: an airborne thermal imaging spectroscopy instrument", Proc. SPIE 7457, Imaging Spectrometry XIV, 745706 (18 August 2009); https://doi.org/10.1117/12.826416

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