Bi-directional laser light detection device having a laser light

Details Bi-directional laser light detection device having a laser light Bi-directional laser light detection device having a laser light

1994-10-19

1997-02-04

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340936, 377 9, 342104, H01J 516

Patent

active

056001320

ABSTRACT:
A bi-directional portable laser light detection device for receiving and detecting laser light from one or more of a plurality of sources includes a laser light pipe that comprises a solid body of material that has a high index of refraction and has an input end, an output end, and at least one wall member connecting the input end and the output end. A generally planar laser light admitting zone on the exterior of the solid body at the input end thereof is oriented so as to generally face the expected direction of the path of laser light from a source along a first opposed path so that, in use, the laser light enters the solid body by way of the admitting zone so as to become admitted laser light. A generally planar laser light emitting zone on the exterior of the solid body at the output end thereof is oriented so as to generally face outwardly toward a laser light sensor such that laser light emitted from the laser light emitting zone is received by a laser light sensor. The external periphery of the solid body is shaped and dimensioned so as to transmit and internally reflect the admitted laser light to the laser light emitting zone. The laser light sensor is oriented so as to receive laser light emitted from the laser light emitting zone of the laser light pipe, and also so as to receive laser light along a second opposed path.

REFERENCES:
patent: 5359404 (1994-10-01), Dunne
patent: 5491464 (1996-02-01), Carter et al.

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