Apparatus for emitting and receiving light

Details Apparatus for emitting and receiving light Apparatus for emitting and receiving light

G - Physics

01

N

G01N 21/88 (2006.01) G01J 3/42 (2006.01) G01N 21/31 (2006.01) G01N 21/35 (2006.01) G01N 21/03 (2006.01)

Patent

CA 2057891

An apparatus for emitting and receiving light comprises an emitter, which consists of a light source (5) and a concave mirror (7), and a receiver which receives light from the emitter and which is connected to an analysing equipment (3). Furthermore, the receiver comprises a concave mirror (9) which is disposed behind the mirror (7) of the emitter and whose diameter is larger than that of the mirror (7) of the emitter and whose focus is located in front of the light source (5). In the focus of the minor (9) is positioned one end of an optical fibre (19) for transmitting the received light to the analysing equipment (3). Moreover, the apparatus comprises a retro-reflector unit (17) for reflecting the light from the emitter to the receiver, and a movable shielding element (11) which is provided between the light source (5) and the optical fibre (19) and which prevents, in a first position, the light from the light source from reaching the optical fibre directly and lets through, in a second position, the light from the light source directly to the optical fibre.

Un appareil pour l'émission et la réception de lumière comprend un émetteur composé d'une source lumineuse (5) et d'un miroir concave (7), ainsi qu'un récepteur pour recevoir la lumière provenant de l'émetteur. Le récepteur, relié à un appareillage d'analyse (3), incorpore un miroir concave (9), disposé derrière le miroir (7) de l'émetteur, dont le diamètre est supérieur à celui dudit miroir (7) de l'emetteur et dont le foyer est situé devant la source lumineuse (5). Une extrémité d'une fibre optique (19) servant à transmettre, à l'appareillage d'analyse la lumière reçue, (3) est positionnée dans le foyer dudit miroir (9). L'appareil comprend également une unité rétro-réflectrice (17) pour réfléchir la lumière provenant de l'émetteur vers le récepteur ainsi qu'un élément de blindage mobile (11), installé entre la source lumineuse (5) et la fibre optique (19). Ledit élément empêche, dans une première position, la lumière provenant de la source lumineuse d'atteindre la fibre optique directement, tout en permettant, dans une deuxième position, à ladite lumière d'atteindre directement la fibre optique.

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