Method and apparatus for reading bar coded data wherein the ligh

Details Method and apparatus for reading bar coded data wherein the ligh Method and apparatus for reading bar coded data wherein the ligh

1978-05-04

1979-07-03

Cook, Daryl W.

Registers

Coded record sensors

Particular sensor structure

235472, 250468, G06K 714, G08C 906

Patent

active

041601564

ABSTRACT:
A method and apparatus for reading bar coded data for entry into portable data collection systems. The data is read by an optical wand wherein the light source is automatically and periodically energized for saving the energy of the system. The D.C. offset voltages are determined and stored in an up/down counter during reading or sampling intervals while the analog signal processing circuits are periodically de-energized. The light source is also calibrated to maximize the power savings and minimize reading errors.

REFERENCES:
patent: 3736410 (1973-05-01), Ragland et al.
patent: 3748483 (1973-07-01), Englund et al.
patent: 3925639 (1975-12-01), Hester
patent: 4072859 (1978-02-01), McWaters

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