Method and apparatus for reading bar code

Details Method and apparatus for reading bar code Method and apparatus for reading bar code

G - Physics

06

K

352/53.74

G06K 9/18 (2006.01) G06K 7/10 (2006.01)

Patent

CA 2007399

A bar code reading arrangement. A laser beam is scanned across a bar code which may be on a remote surface. Two detectors receive light reflected from the bar code, and convert it to an electrical signal. The detectors are laterally spaced on opposite sides of a line defined by the bi-section of the triangular area which is scanned by the laser beam. The electrical signal from the detector receiving only diffusely reflected light is used to identify the content of the bar code. The invention may be practiced in a hand-held unit with trigger means to initiate the bar code reading operation.

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