Elastic radiation scatter-detecting safety device, analyzer...

G - Physics – 01 – J

Patent

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Details

G01J 3/44 (2006.01) A61B 5/00 (2006.01) B23K 26/04 (2006.01) G01J 1/42 (2006.01)

Patent

CA 2286065

A device for detecting elastically scattered radiation comprising: a source (16) of monochromatic radiation having a controllable output, a detector (56) for detecting the elastically scattered radiation from a specimen (12), and a signal conditioning circuit (68) comprising a transducer and comparator. The output of the transducer is compared to a threshold signal to produce a control output signal for source (16). The device is further included in a raman spectrometry apparatus that further includes an optical probe (32). The probe comprises a fluid-tight body that encloses three optical channels, preferabyl comprising fibers that carry monochromatic radiation to the speciment and separately collect inelastically and elastically scattered radiation from the specimen.

L'invention concerne un dispositif permettant de détecter un rayonnement à diffusion élastique, qui comprend: une source (16) de rayonnement monochromatique à puissance modulable, un détecteur (56) pour détecter le rayonnement à diffusion élastique en provenance d'un échantillon (12) ainsi qu'un circuit de mise en forme de signal (68) comportant un transducteur et un comparateur. Le signal de sortie du transducteur est comparé à un signal de sorte qu'un signal de commande en sortie destiné à la source (16) soit produit. Ce dispositif est, de plus, intégré à un spectromètre Raman, pourvu, en outre, d'une sonde optique (32). Celle-ci comprend un corps étanche aux fluides renfermant trois voies optiques, de préférence des fibres optiques, qui transportent le rayonnement monochromatique jusqu'à l'échantillon et captent séparément le rayonnement à diffusion inélastique et élastique en provenance de cet échantillon.

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