Method and apparatus for reading two-dimensional bar code symbol

Details Method and apparatus for reading two-dimensional bar code symbol Method and apparatus for reading two-dimensional bar code symbol

1994-06-30

1997-04-15

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235472, G06K 710

Patent

active

056212038

ABSTRACT:
A plurality of the areas of different light reflectivity of a bar code symbol, or the like, are simultaneously illuminated, using, e.g., a beam of laser light that has an elongated cross-section. The laser light beam is swept over the symbol in a direction transverse to the elongated dimension of the illuminated region so that a two-dimensional area of the symbol is illuminated over time, until the symbol is read. The light that reflects from the illuminated region of the symbol is imaged on a linear sensor array, which is then scanned or read out to produce signals representative of spatial intensity variations of the imaged light along a linear path in the field of view.

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