A luminescence based sensor

Details A luminescence based sensor A luminescence based sensor

G - Physics

01

N

G01N 21/64 (2006.01) G01N 21/55 (2006.01)

Patent

CA 2434983

The invention provides a luminescent based sensor having a luminescent material optically coupled to a substrate, and adapted to be used in a medium or environment such as water or air. A detector is provided to detect light that is emitted into the substrate by the material. The substrate is adapted to redirect light that is emitted into the substrate at angles with the range .theta.esc .theta. .theta.lsc where .theta.esc is the critical angle of the environment/substrate interface and .theta.lsc is the critical angle of the luminescent layer/substrate interface. Examples of possible configurations are described.

L'invention concerne un capteur dont le fonctionnement est fondé sur la luminescence, comportant une matière luminescente optiquement couplée à un substrat, et conçu pour être utilisé dans un milieu ou un environnement tel que l'eau ou l'air. Un détecteur est utilisé pour détecter la lumière émise dans le substrat par cette matière. Ledit substrat est conçu pour rediriger la lumière émise dans le substrat à des angles de l'ordre de .theta.?es¿¿c? ? .theta. ? .theta.?ls¿¿c?, .theta.?es¿¿c? étant l'angle critique de l'interface environnement/substrat, et .theta.?ls¿¿c? étant l'angle critique de l'interface couche luminescente/substrat. Des exemples de configurations possibles sont également décrits.

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