Photoelectric switch

Details Photoelectric switch Photoelectric switch

1981-06-29

1983-04-26

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

307311, H01J 4014

Patent

active

043814468

ABSTRACT:
There is provided a photoelectric switch comprising a light projecting segment including a pulse oscillator and a light-emitting element adapted to give a pulse light emission in response to an output pulse of the pulse oscillator, a light reception segment including a light reception element adapted to yield a light reception signal on incidence of light, a gate circuit adapted to gate the light reception signal according to the output pulse of the pulse oscillator and an integration circuit for integrating outputs of the gate circuit, and a control circuit for varying the pulse frequency by controlling the pulse oscillator on generation of a light reception signal from the light reception element.

REFERENCES:
patent: 4207466 (1980-06-01), Drage et al.

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