Photoelectric detector

Details Photoelectric detector Photoelectric detector

G - Physics

01

S

340/136, 73/57

G01S 17/00 (2006.01) G01S 17/02 (2006.01) G01S 17/93 (2006.01)

Patent

CA 1322670

ABSTRACT OF THE DISCLOSURE: Here is disclosed a photoelectric detector comprising first and second light sources respectively having different light emitting areas, a photoelectric transducer member adapted to receive the light emitted from these light sources and then reflected on an object to be detected, and a signal processing circuit functioning to separate electric signals corresponding to the first and second light sources from an output of the photoelectric transducer member and to compare these separated two electric signals to each other so that presence or absence and a position of the object are detected on the basis of such comparison of the two electric signals.

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