Photoelectric movement detector with varying amplitude light sou

Details Photoelectric movement detector with varying amplitude light sou Photoelectric movement detector with varying amplitude light sou

1981-05-04

1984-07-03

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502221, 340556, G01V 904

Patent

active

044581467

ABSTRACT:
Device for determining movements with light, including a light transmitter for radiating light pulses with steeply rising and slowly falling flanks, and a light receiver for the light pulses radiated by the light transmitter, the light receiver including an evaluation threshold device for measuring the duration of individual light pulses, for storing the pulses and for comparing the pulses with each other.

REFERENCES:
patent: 3309688 (1967-03-01), Yanishevsky
patent: 3946241 (1976-03-01), Malinowski

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