Side illuminated multi point multi parameter optical fiber...

G - Physics – 01 – D

Patent

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G01D 5/353 (2006.01) G01D 5/26 (2006.01) G01F 23/292 (2006.01) G01N 21/00 (2006.01) G02B 6/00 (2006.01)

Patent

CA 2750515

A side illuminated multi point multi parameter optical fiber sensor that requires no sensitive coating is provided. This sensor comprises an optical fiber having at least one removed cladding section as the sensitive region, at least one probing light source that side illuminates the fiber, a power supply, a detector, a signal processor and a display. The sensitive optical fiber is optically affected by the presence of a measurand medium that can fluoresce, phosphoresce, absorb and/or scatter the probing light. This probing light is guided by the fiber core towards a detector which measures the light intensity and this light intensity is correlated with a measurand.

La présente invention porte sur un capteur à fibres optiques multipoint multiparamètre éclairé latéralement qui ne requiert pas de revêtement sensitif. Ce capteur comprend une fibre optique ayant au moins une section de gaine retirée servant de section sensitive, au moins une source lumineuse d'exploration qui éclaire latéralement la fibre, une alimentation électrique, un détecteur, un processeur de signaux et un affichage. La fibre optique sensible subit un effet optique dû à la présence d'un support de mesurande qui peut absorber et/ou diffuser la lumière d'exploration et/ou la rendre phosphorescente ou fluorescente. Cette lumière d'exploration est guidée par le cur de la fibre vers un détecteur qui mesure l'intensité lumineuse et cette intensité lumineuse est mise en corrélation avec un mesurande.

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