Spectrometry using broadand filters with overlapping...

G - Physics – 01 – J

Patent

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G01J 3/51 (2006.01) G01N 21/31 (2006.01)

Patent

CA 2445680

The invention provides a spectrometer (10) which includes a filter arrangement (16,18), in addition to any optional filters (20) for limiting an operational wavelength range of the spectrometer, the filter arrangement (16,18) comprising a plurality of broadband optical filters or broadband optical filter areas each of known transmission and being located or selectively locatable in a path of collected incident spectral radiation (44). The spectrometer further includes at least one detector (24) arranged to measure the spectral radiation passing through at least one of the broadband filters located in the path of collected incident spectral radiation, and signal- processing means (34) for recovering the spectrum of the collected spectral radiation from measurements by the detector (24).

L'invention concerne un spectromètre (10) comprenant un dispositif de filtrage (16, 18) en plus des éventuels filtres (20) destinés à limiter une gamme de longueur d'onde opérationnelle du spectromètre, ce dispositif de filtrage (16, 18) comportant une pluralité de filtres optiques large bande ou des zones de filtrage optique large bande présentant une transmission connue et se trouvant ou pouvant se trouver sélectivement dans le trajet d'un rayonnement spectral incident capté (44). Ce spectromètre comprend également au moins un détecteur (24) conçu pour mesurer le rayonnement spectral traversant l'un au moins des filtres large bande situés dans le trajet du rayonnement spectral incident capté, ainsi qu'une unité de traitement de signaux (34) destinée à récupérer le spectre du rayonnement spectral capté à partir des mesures réalisées par le détecteur (24).

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