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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 6, Iss. 4 — Feb. 14, 2000
  • pp: 92–103

Real-time gas-correlation imaging employing thermal background radiation

Jonas Sandsten, Petter Weibring, Hans Edner, and Sune Svanberg  »View Author Affiliations

Optics Express, Vol. 6, Issue 4, pp. 92-103 (2000)

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Real-time imaging of gas leaks was demonstrated using an IR camera employing outdoor thermal background radiation. Ammonia, ethylene and methane detection was demonstrated in the spectral region 7–13 µm. Imaging was accomplished using an optical filter and a gascorrelation cell matching the absorption band of the gas. When two gases, such as ammonia and ethylene, are absorbing in the same wavelength region it is possible to isolate one for display by using gas-correlation multispectral imaging. Results from a field test on a leaking gas tanker are presented as QuickTime movies. A detection limit of 200 ppm×meter for ammonia was accomplished in this setup when the temperature difference between the background and the gas was 18 K and the frame rate was 15 Hz.

© Optical Society of America

OCIS Codes
(040.3060) Detectors : Infrared
(110.3080) Imaging systems : Infrared imaging
(280.1120) Remote sensing and sensors : Air pollution monitoring
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:
Research Papers

Original Manuscript: January 3, 2000
Published: February 14, 2000

Jonas Sandsten, Petter Weibring, Hans Edner, and Sune Svanberg, "Real-time gas-correlation imaging employing thermal background radiation," Opt. Express 6, 92-103 (2000)

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