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Proceedings Paper

Remote gas detection and quantitative analysis from infrared emission spectra obtained by Fourier transform infrared spectroscopy
Author(s): Moira Hilton; Alan H. Lettington; Ian M. Mills
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Paper Abstract

Techniques for obtaining quantitative values of the temperatures and concentrations of remote hot gaseous effluents from their measured passive emission spectra have been examined in laboratory experiments. The high sensitivity of the spectrometer in the vicinity of the 2397 cm-1 band head region of CO2 has allowed the gas temperature to be calculated from the relative intensity of the observed rotational lines. The spatial distribution of the CO2 in a methane flame has been reconstructed tomographically using a matrix inversion technique. The spectrometer has been calibrated against a black body source at different temperatures and a self absorption correction has been applied to the data avoiding the need to measure the transmission directly. Reconstruction artifacts have been reduced by applying a smoothing routine to the inversion matrix.

Paper Details

Date Published: 29 June 1994
PDF: 8 pages
Proc. SPIE 2222, Atmospheric Propagation and Remote Sensing III, (29 June 1994); doi: 10.1117/12.177976
Show Author Affiliations
Moira Hilton, Univ. of Reading (United Kingdom)
Alan H. Lettington, Univ. of Reading (United Kingdom)
Ian M. Mills, Univ. of Reading (United Kingdom)


Published in SPIE Proceedings Vol. 2222:
Atmospheric Propagation and Remote Sensing III
Walter A. Flood; Walter B. Miller, Editor(s)

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