Optical code reader and format

Details Optical code reader and format Optical code reader and format

1990-02-22

1990-12-25

Trafton, David L.

Registers

Coded record sensors

Readout control

235462, 235494, G06K 700

Patent

active

049805444

ABSTRACT:
An optical code reader system includes an optical code reader and a corresponding optical code format. The code reader includes a detector circuit for establishing an adaptive threshold level related to the difference in successive positive and negative peaks of the analog signal corresponding to white and black areas of the code. The code format comprises a plurality of alternating encoded black and white areas bounded by white quiet zones and black preset areas associated with the quiet zones for presetting the threshold value of the detector circuit to a known level before the code is read.

REFERENCES:
patent: 3543007 (1970-11-01), Brinker et al.
patent: 3860794 (1975-01-01), Knockeart et al.
patent: 3862400 (1975-01-01), Thomson
patent: 3909594 (1975-09-01), Allais et al.
patent: 3912943 (1975-10-01), Wilson
patent: 3949233 (1976-04-01), Gluck
patent: 4158435 (1979-06-01), Nakanishi et al.
patent: 4162408 (1979-07-01), Hansen
patent: 4335301 (1982-06-01), Palmer et al.
patent: 4517455 (1985-05-01), Benitez, III et al.
patent: 4567361 (1986-01-01), Rosenthal
patent: 4578568 (1986-03-01), Tsuzuki
patent: 4740675 (1988-04-01), Brosnan et al.

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