Wide-angle interference-polarization filter of a video spectroradiometer-gas viewer for recording nitrogen dioxide

Afonin, A. V.; Drichko, N. M.; Sivyakov, I. N.

doi:10.1364/jot.71.000776

Cited by 2 publications

(2 citation statements)

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“…A coded aperture based spectral imaging system capable of resolving into closely spaced (approx 10 nm) spectral windows has been demonstrated operating across the visible band [9,10]. Video capture and processing technology has been used for imaging anthropogenic gas distributions [11]- [13] such as NO 2 and SO 2 which has the potential to be useful from satellites.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

Passive scene imaging of absorbing gases by narrowband dielectric filter modulation

Benton¹

2013

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

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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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Wide-angle interference-polarization filter of a video spectroradiometer-gas viewer for recording nitrogen dioxide

Cited by 2 publications

References 0 publications

Passive scene imaging of absorbing gases by narrowband dielectric filter modulation

Passive scene imaging of absorbing gases by narrowband dielectric filter modulation

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

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