Gas characterisation based on a snapshot interferometric imaging spectrometer

Aneline Dolet; Daniele Picone; Mauro Dalla Mura; Didier Voisin; Silvère Gousset; Sylvain Douté; Etienne Le Coarer

doi:10.1117/12.2533338

7 October 2019 Gas characterisation based on a snapshot interferometric imaging spectrometer

Aneline Dolet, Daniele Picone, Mauro Dalla Mura, Didier Voisin, Silvère Gousset, Sylvain Douté, Etienne Le Coarer

Proceedings Volume 11155, Image and Signal Processing for Remote Sensing XXV; 1115502 (2019) https://doi.org/10.1117/12.2533338
Event: SPIE Remote Sensing, 2019, Strasbourg, France

Abstract

Modern atmospheric gas monitoring applications demand progressively better performances with regards to spatial, spectral and temporal resolutions. In this context, great potential is shown by a newly developed family of cutting-edge snapshot imaging spectrometers based on Fabry-Perot interferometry, whose conceptual design was patented under the name ImSPOC. Three different sensor prototypes based on the ImSPOC concept are under development: 1) in the near infrared wavelength range for CH₄ or H₂S detection, 2) in ultra-violet and visible range for NO₂, O₄, O₃, and O₂ characterisation and 3) specifically for CO₂ monitoring. After the realisation of these prototypes there is the need arose to provide intelligible and well-calibrated acquisitions for the final users. This study presents the ImSPOC concept from the signal processing point of view, framing the optical transformations performed in the instruments under an appropriate mathematical model formulation. Additionally, preliminary developments are presented to address the first step of the signal processing pipeline for this instrument: the estimation of the thickness of each interferometer. This is a fundamental step for obtaining calibrated acquisitions that could then be used for gas monitoring.

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Citation Download Citation

Aneline Dolet, Daniele Picone, Mauro Dalla Mura, Didier Voisin, Silvère Gousset, Sylvain Douté, and Etienne Le Coarer "Gas characterisation based on a snapshot interferometric imaging spectrometer", Proc. SPIE 11155, Image and Signal Processing for Remote Sensing XXV, 1115502 (7 October 2019); https://doi.org/10.1117/12.2533338

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