Bar-code reader, method of reading a bar code and computer...

Details Bar-code reader, method of reading a bar code and computer... Bar-code reader, method of reading a bar code and computer...

2006-04-04

2006-04-04

Fureman, Jared J. (Department: 2876)

Registers

Coded record sensors

Particular sensor structure

C235S462110, C235S462190, C235S462020, C235S462180

Reexamination Certificate

active

07021545

ABSTRACT:
In an optical bar-code reader, an optical scanner optically scans a bar code to obtain optical power of light reflected from white bars and black bars of the bar code, a differentiation unit calculates a differential of the optical power to obtain a differential waveform, a dividing unit divides the differential waveform into a positive waveform and a negative waveform, a bar-code correcting unit calculates correct widths of black bars in the bar code from the positive waveform and the negative waveform to create corrected bar-code data, and a converter converts the corrected bar-code data into character data that is an array of numerals and alphabets.

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patent: 2001/0015378 (2001-08-01), Watanabe et al.
patent: 2002/0020747 (2002-02-01), Wakamiya et al.
patent: 0 667 589 (1995-08-01), None
patent: 55-143682 (1980-11-01), None
patent: 2001-19271 (2001-01-01), None
patent: 2002-560079 (2002-01-01), None

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