Light barrier

G - Physics – 01 – V

Patent

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Details

G01V 8/14 (2006.01) G01V 8/20 (2006.01)

Patent

CA 2747884

A light barrier having at least one transmitter (6) and at least one receiver (8) for a light beam and having a light path (1), which runs between a first side (2) and a second side (4) of a region to be monitored, can be produced flexibly and with little complexity by virtue of the transmitter (6) and of the receiver (8) being situated on the first side (2) and by virtue of the second side (4) containing an optical system (10) which picks up the primary light beam (7) emitted by the transmitter and which deflects the primary light beam (7) and returns it to the receiver (8) via the light path (1) to the first side (2) as a secondary light beam (9), which is separate from the primary light beam (7), at a distance from the primary light beam (7).

La présente invention concerne une barrière lumineuse comprenant au moins un émetteur (6) et au moins un récepteur (8) destinés à un faisceau lumineux, et une trajectoire de lumière (1) s'étendant entre un premier côté (2) et un deuxième côté (4) d'une zone à surveiller. La barrière lumineuse peut être réalisée de manière flexible et peu complexe grâce au fait que l'émetteur (6) et le récepteur (8) se trouvent sur le premier côté (2) et que le deuxième côté (4) comporte une optique (10) qui prend en charge le faisceau lumineux primaire (7) émis par l'émetteur, le dévie et le renvoie sous la forme d'un faisceau lumineux secondaire (9) séparé du faisceau lumineux primaire (7), à distance de celui-ci, sur la trajectoire de lumière (1) vers le premier côté (2) sur le récepteur (8).

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