Pollution imagery by optical interferometry: application to SO(2) gas.
The interferometric correlation method can provide a simple and inexpensive solution for pollution imagery, especially in the case of a spatially localized gaseous cloud. We describe herein a general method for designing an interferometric correlator for the analysis of any pollutant gas that has regularly distributed absorption spectral lines. We also present a setup using a birefringent interferometer in front of a simplified camera formed by a plano-convex lens and a linear CCD sensor; this demonstrates the monitoring of SO(2) gas. Results from the laboratory simulation show the feasibility of this method. Outdoor measurements permit determination of the required conditions for on-site real-time measurement.
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Nguyên
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Galais
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Fortunato