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Proceedings Paper

Ultraspectral imaging for propulsion test monitoring
Author(s): Leonard John Otten III; Bernard Al Jones; Philip Prinzing; William H. Swantner; Bruce Rafert
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Paper Abstract

Under a NASA Stennis Space Center (SSC) SBIR, technologies required for an imaging spectral radiometer with wavenumber spectral resolution and milliradian spatial resolution that operates over the 8 micrometers to 12 micrometers (LWIR), and 3 micrometers to 5 micrometers (MWIR) bands, for use in a non-intrusive monitoring static rocket firing application are being investigated. The research is based on a spatially modulated Fourier transform spectral imager to take advantage of the inherent benefits in these devices in the MWIR and LWIR. The research verified optical techniques that could be merged with a Sagnac interferometer to create conceptual designs for an LWIR imaging spectrometer that has a 0.4 cm-1 spectral resolution using an available HgCdTe detector. These same techniques produce an MWIR imaging spectrometer with 1.5 cm-1 spectral resolution based on a commercial InSb array. Initial laboratory measurements indicate that the modeled spectral resolution is being met. Applications to environmental measurement applications under standard temperatures can be undertaken by taking advantage of several unique features of the Sagnac interferometer in being able to decouple the limiting aperature from the spectral resolution.

Paper Details

Date Published: 7 February 2002
PDF: 11 pages
Proc. SPIE 4574, Instrumentation for Air Pollution and Global Atmospheric Monitoring, (7 February 2002); doi: 10.1117/12.455145
Show Author Affiliations
Leonard John Otten III, Kestrel Corp. (United States)
Bernard Al Jones, Kestrel Corp. (United States)
Philip Prinzing, Kestrel Corp. (United States)
William H. Swantner, BSC Optics (United States)
Bruce Rafert, Michigan Technological Univ. (United States)

Published in SPIE Proceedings Vol. 4574:
Instrumentation for Air Pollution and Global Atmospheric Monitoring
James O. Jensen; Robert L. Spellicy, Editor(s)

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