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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 32, Iss. 21 — Jul. 20, 1993
  • pp: 4037–4050

Backscatter absorption gas imaging: a new technique for gas visualization

Thomas G. McRae and Thomas J. Kulp  »View Author Affiliations


Applied Optics, Vol. 32, Issue 21, pp. 4037-4050 (1993)
http://dx.doi.org/10.1364/AO.32.004037


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Abstract

This paper presents a new laser-based method of gas detection that permits real-time television images of gases to be produced. The principle of this technique [which is called backscatter absorption gas imaging (BAGI)] and the operation of two instruments used to implement it are described. These instruments use 5-W and 20-W CO2 lasers to achieve gas imaging at ranges of approximately 30 and 125 m, respectively. Derivations of relevant BAGI signal equations that can be used to predict the performance of a gas imager are provided. The predictions of this model and the measured range performance of an extended-range gas imager are compared. Finally, the results of gas sensitivity measurements and imaging tests on flowing gases are presented. These can be used to generate a realistic estimate of the BAGI sensitivity expected in detecting leaks of many different vapors.

© 1993 Optical Society of America

History
Original Manuscript: January 17, 1992
Published: July 20, 1993

Citation
Thomas G. McRae and Thomas J. Kulp, "Backscatter absorption gas imaging: a new technique for gas visualization," Appl. Opt. 32, 4037-4050 (1993)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-32-21-4037

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