Imaging of methane gas using a scanning, open-path laser system

Show simple item record Gibson, Graham van Well, Ben Hodgkinson, Jane Pride, Russ D. Strzoda, Rainer Murray, Stuart Bishton, Steve Padgett, Miles 2006-09-14T14:42:25Z 2006-09-14T14:42:25Z 2006-02
dc.identifier.citation Graham Gibson, Ben van Well, Jane Hodgkinson, Russ Pride, Rainer Strzoda, Stuart Murray, Steve Bishton and Miles Padgett. Imaging of methane gas using a scanning, open-path laser system. New Journal of Physics 8, 26, 2006 en
dc.identifier.issn 1367-2630
dc.description.abstract We have developed an imaging system for the detection and visualization of methane gas leaks. The system is based on a distributed feedback InGaAs laser diode emitting at 1.65μm, the beam from which is directed at neighbouring objects. The backscattered light is collected by a Fresnel lens and the gas concentration is deduced from the reduction in collected intensity as measured using a second derivative wavelength modulation technique. The incident laser and the collected beam are both scanned over an area to form an image of the gas emission. To ease the task of locating the source of the emission, we combine the resulting low-resolution image of the gas emission with a high-resolution colour image of the scene. Our results show that the system can image a gas cloud of 1mm effective thickness at a range of several metres, sufficient to detect a gas leak of 1 litre min−1 in light to moderate winds. en
dc.format.extent 586034 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher IOP Publishing Ltd en
dc.title Imaging of methane gas using a scanning, open-path laser system en
dc.type Article en

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