Improvements in, or relating to, infra-red detection

G - Physics – 01 – J

Patent

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G01J 5/34 (2006.01) G01J 3/42 (2006.01) G01N 21/55 (2006.01)

Patent

CA 2368989

A system and method for analysing a material using infra-red radiation are described, along with an infra-red detector for use with the system and the method. The system (10) comprises a rectangular housing (42) to which an elongated probe (24) is attached, and includes the following parts: a spectrometer (12), an infra-red detector (14), first and second optical fibre bundles (16, 18), first and second converging lenses (20, 22), collimating lens (26), infra-red source (28), attenuated total reflectance element (44) and chopper (54). The infra-red detector includes an array of detector elements formed on the lower surface of a layer of pyroelectric copolymer material which is stretched over a rigid silicon frame, and an array of upper electrodes exposed to the infra-red radiation to be detected.

L'invention concerne un système et un procédé permettant d'analyser une matière au moyen d'un rayonnement infrarouge et d'un détecteur infrarouge. Le système (10) comporte un boîtier rectangulaire (42) auquel est fixée une sonde allongée (24), et comprend les pièces suivantes : un spectromètre (12), un détecteur infrarouge (14), un premier et un second faisceau de fibres optiques (16, 18), une première et une seconde lentille convergente (20, 22), une lentille collimatrice (26), une source d'infrarouges (28), un élément à réflectance totale atténuée (44) et un hacheur (54). Le détecteur infrarouge comprend un ensemble d'éléments de détection formés sur la surface inférieure d'une couche de matière copolymère pyroélectrique, tendue par-dessus un cadre rigide en silicium, et un ensemble d'électrodes supérieures exposées au rayonnement infrarouge à détecter.

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