Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1975-09-08
1977-02-08
Smith, Alfred E.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
235 6111E, 250568, G06K 710
Patent
active
040073777
ABSTRACT:
A scanning system for supermarket check-out counters or the like, in which a package bearing the universal product code symbol is passed over a scanning window where the code symbol is scanned by a laser-generated and galvanometer-deflected light beam. The complex saw toothed laser scanning pattern, produced by a programmable read-only memory controlled galvanometer system, intercepts the coded symbol, regardless of its orientation, at high symbol speeds and permits higher than normal instantaneous laser power while conforming to safety standards prescribed by the Federal Bureau of Radiological Health. The beam reflected from the coded symbol is collected via a low-cost fiber optic bundle in a photomultiplier, and the video signal is processed in simple circuitry into a square wave signal suitable for subsequent digital computing equipment.
REFERENCES:
patent: 3184732 (1965-05-01), Haynes
patent: 3652154 (1972-03-01), Gebel
patent: 3796863 (1974-03-01), Nickl et al.
patent: 3836260 (1974-09-01), Ulyanov
patent: 3916158 (1975-10-01), Sansome
patent: 3922539 (1975-11-01), Carnes et al.
B382,783, Jan. 1975, Bowen et al., 235/61.11 E.
Simon Donald R.
Vasudeva Anil
Zukatus, Jr. John J.
Bell Edward L.
Lewis Charles R.
Moore David K.
Smith Alfred E.
Smith Robert E.
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