Self-detecting light-emitting-diode proximity sensor

Mark Johnson

doi:10.1364/CLEO.1984.THI16

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 1984),
paper THI16
•https://doi.org/10.1364/CLEO.1984.THI16

Self-detecting light-emitting-diode proximity sensor

Mark Johnson

Conference on Lasers and Electro-Optics 1984

Anaheim, California United States
19–22 June 1984
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Poster Session: 2 (THI)

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M. Johnson, "Self-detecting light-emitting-diode proximity sensor," in Conference on Lasers and Electro-Optics, D. Hodges, W. Silfvast, G. Bjorklund, and E. Hinkley, eds., OSA Technical Digest (Optica Publishing Group, 1984), paper THI16.

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Abstract

Reflection and transmission mode optocouplers enjoy wide use in object motion sensing applications. However, conventional devices are too bulky and expensive to be used in many proximity sensing applications. We propose and demonstrate here a novel optoelectronic sensor consisting of a LED used simultaneously as emitter and detector.

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