Hyperspectral characterization of fluorescent organic contaminants on optical payloads

Bourcier, Frédéric; Pansu, Robert; Faye, Delphine; Nouy, Patrice Le; Spezzigu, Piero

doi:10.1117/12.2304189

Cited by 2 publications

(1 citation statement)

References 3 publications

(8 reference statements)

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“…The resolution is 512 pixels in a field of view of 3.5 degrees and with a spectral resolution of 1 nm in UV range, 2-3 nm in VIS range and 5 nm in NIR range, guarantying an 80% flux in each pixel of the cube image. Its development was described in a previous work [9][10][11][12][13], including more details about technical description and first results on real samples. The light source is a LaserComponents LED at 270 nm on a radiator.…”

Section: Fluorescence Measurementmentioning

confidence: 99%

Detection and characterization of contamination with fluorescence spectroscopy

Gouisset¹,

Rioland

Bourcier

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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In the field of failure analysis and in particular molecular and particulate contamination, being able to detect any trace of contaminants during the integration of an orbital spacecraft is crucial. In this context, fluorescence allows not only to detect but also to discriminate contaminants. We studied the fluorescence response of two epoxy adhesives, typical sources of spacecraft contamination in orbit with a portable broadband hyperspectral instrument (UV-Vis-NIR) developed in collaboration with the CNES and Intraspec Technologies, but also with a commercial spectrofluorometer. These measurements had two objectives, evaluate the performance of our hyperspectral instrument in order to identify prospect of improvement, but as well study the pertinence of fluorescence signature study in the contamination field. The first goal brings out that the hyperspectral instrument is capable of imaging the scene and allows us to extract fluorescence spectra from the image, but it still needs development, especially in term of sensitivity in UV range. The second goal shows promising results. Fluorescence studies with the spectrofluorometer emphasize that fluorescence spectra are specific to the chemical nature of the contaminant, which allows us to clearly discriminate them.

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