Optical code reader wherein guide light source is turned on before turn-on of an illumination light source and is turned off after turn-on of the illumination light source
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United States of America Patent
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Nov 30, 1999
Issued Date -
N/A
app pub date -
Feb 18, 1998
filing date -
Sep 27, 1993
priority date (Note) -
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Abstract
An optical code reader includes a reading window, a reading control circuit for sensing an image of a 2-dimensional code via the reading window in a state where the reading window is set within a preset distance from the 2-dimensional code and converting the sensed image into image data, a guide light source for applying a guide light beam to permit the 2-dimensional code to be guided within the reading range of the reading control circuit, and a portable frame having an opening used as the reading window, for accommodating the reading control circuit and guide light source. In the optical code reader, the guide light beam indicates the center of the reading range and is applied from the guide light source except for a period during which the image of the 2-dimensional code is sensed by the reading control circuit.
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