Scanning arrangement and method in which the focus is varied in operative correlation with the scanning angle
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United States of America Patent
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Jan 31, 1995
Grant Date -
N/A
app pub date -
Dec 23, 1991
filing date -
Dec 23, 1991
priority date (Note) -
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Abstract
A device for reading indicia on a target in which the indicia has regions of differing light reflectivity. The device directs a light beam toward the indicia, and collects reflected light from the indicia. The focus of the light beam is varied to enable the device to read indicia at different working distances, and the maximum scanning angle of the light beam is varied in operative correlation with the focus.
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