Optical reading apparatus

Details Optical reading apparatus Optical reading apparatus

1983-10-17

1986-01-28

Pitts, Harold I.

Registers

Coded record sensors

Particular sensor structure

235454, 235472, G06K 710

Patent

active

045673608

ABSTRACT:
An optical reading apparatus of the invention has a light source and a light-receiving unit for receiving light reflected from a data recording medium on which data is recorded and for producing an electrical signal corresponding to an intensity of received light. The light source is driven by a driving circuit. An electrical signal from the light-receiving unit is recognized by a recognizing circuit. The apparatus also has a time counter for producing a signal of a constant period and a detection circuit for detecting if the electrical signal is produced from the light-receiving unit. The driving circuit turns on/off the light source at a proper timing in accordance with ON and OFF signals supplied from a signal generating circuit.

REFERENCES:
patent: 4240064 (1980-12-01), Choudhury
patent: 4356389 (1982-10-01), Quirey

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