Code reader and code reading method for reading code printed on

Details Code reader and code reading method for reading code printed on Code reader and code reading method for reading code printed on

1995-07-10

1997-12-23

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235455, 235470, 235472, G06K 710

Patent

active

057010005

ABSTRACT:
A code reader, for reading a code printed on a surface of a printing medium, includes a photoelectric device for converting light reflected from the code into an electric signal. An amplifier is provided for amplifying the electric signal converted by the photoelectric device. A gain adjusting device is provided for adjusting a gain of the amplifier such that a summit level of the electric signal can be raised to a predetermined upper limit level. A digitizing device is provided for converting the electric signal amplified by the amplifier into a binary signal, using a predetermined level.

REFERENCES:
patent: 4528444 (1985-07-01), Hama et al.
patent: 5248871 (1993-09-01), Takenaka
patent: 5294783 (1994-03-01), Hammond, Jr. et al.
patent: 5298728 (1994-03-01), Elliott et al.
patent: 5349171 (1994-09-01), Tamai et al.
patent: 5350908 (1994-09-01), Bechtel
patent: 5396053 (1995-03-01), Swartz et al.
patent: 5418357 (1995-05-01), Inoue et al.

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