Developing video spectroradiometer-gas-viewers for determining the spatial distribution of anthropogenic gases in the near-earth atmosphere and the results of a full-scale experiment

Davydov, V. S.; Afonin, A. V.

doi:10.1364/jot.74.000100

Cited by 2 publications

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“…Although target gas concentration levels may be low, the absorption paths can be very long (several kms) enabling detection with high sensitivity. 2 Video technology has been used for imaging anthropogenic gas distributions 3,4 such as NO 2 and SO 2 . Typically this has been achieved using Fourier transform infrared (FTIR) spectroscopy techniques, 5 which are scanning rather than direct-imaging techniques.…”

Section: Introductionmentioning

confidence: 99%

Technique for passive scene imaging of gas and vapor plumes using transmission-waveband modulation

Benton

2012

Opt. Eng

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Abstract.A new approach to locating gas and vapor plumes is proposed that is entirely passive. By modulating the transmission waveband of a narrow-band filter, an intensity modulation is established that allows regions of an image to be identified as containing a specific gas with absorption characteristics aligned with the filter. A system built from readily available components was constructed to identify regions of NO 2 . Initial results show that this technique was able to distinguish an absorption cell containing NO 2 gas in a test scene.

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Section: Introductionmentioning

confidence: 99%

Technique for passive scene imaging of gas and vapor plumes using transmission-waveband modulation

Benton

2012

Opt. Eng

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Passive scene imaging of absorbing gases by narrowband dielectric filter modulation

Benton¹

2013

J. Eur. Opt. Soc.-Rapid Publ.

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This paper examines a method for locating within a scene a distribution of an absorbing gas using a passive imaging technique. An oscillatory modulation of the angle of a narrowband dielectric filter located in front of a camera imaging a scene, gives rise to an intensity modulation that differs in regions occupied by the absorbing gas. A preliminary low cost system has been constructed from readily available components which demonstrates how the location of gas within a scene can be implemented. Modelling of the system has been carried out, especially highlighting the transmission effects of the dielectric filter upon different regions of the image.

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Developing video spectroradiometer-gas-viewers for determining the spatial distribution of anthropogenic gases in the near-earth atmosphere and the results of a full-scale experiment

Cited by 2 publications

References 0 publications

Technique for passive scene imaging of gas and vapor plumes using transmission-waveband modulation

Technique for passive scene imaging of gas and vapor plumes using transmission-waveband modulation

Passive scene imaging of absorbing gases by narrowband dielectric filter modulation

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