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17 November 2017 Hyperspectral characterization of fluorescent organic contaminants on optical payloads
Frédéric Bourcier, Robert Pansu, Delphine Faye, Patrice Le Nouy, Piero Spezzigu
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Proceedings Volume 10563, International Conference on Space Optics — ICSO 2014; 1056348 (2017) https://doi.org/10.1117/12.2304189
Event: International Conference on Space Optics — ICSO 2014, 2014, Tenerife, Canary Islands, Spain
Abstract
The increase of performance of new optical instruments for science and Earth observation always leads to higher requirements in terms of contamination due to particle sedimentation in cleanrooms and deposition of chemical species in vacuum environment. Specific cleanliness control procedures are implemented in order to mitigate the risks of contamination on optical sensors and sensitive diopters, especially when used for UV applications. Such procedures are commonly carried out in cleanrooms and are described in both European ECSS-Q-ST-70-50C and NASA SN-C-0005D standards. UV light at 365 nm is often used for the inspection of optical sensitive surfaces to localize and to evaluate the amount of fluorescent particles, essentially coming from textile fibers. But other groups of compounds can be observed with a different spectral response and distribution, like adhesives and resins or even organic residues. Therefore, we could take advantage of this spectral information closely linked to specific molecules for partial identification of these materials before further investigation involving wipe on flight model and measurement in a laboratory.
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Frédéric Bourcier, Robert Pansu, Delphine Faye, Patrice Le Nouy, and Piero Spezzigu "Hyperspectral characterization of fluorescent organic contaminants on optical payloads", Proc. SPIE 10563, International Conference on Space Optics — ICSO 2014, 1056348 (17 November 2017); https://doi.org/10.1117/12.2304189
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KEYWORDS
Luminescence
Molecules
Mirrors
Astronomical imaging
Absorption
Adhesives
Sensors
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