Optical information reading apparatus
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United States of America Patent
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-
Oct 12, 1993
Grant Date -
N/A
app pub date -
Jun 10, 1991
filing date -
Jun 8, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical information reading apparatus such as a bar code reader includes a mirror drive unit rotatable to oscillate a movable scanning mirror simultaneously about a first axis and a second axis perpendicular to the first axis so that a laser beam irradiated from a laser unit is directed by the movable scanning mirror vertically and horizontally to scan parallel arranged plural rows bar codes with a raster scanning pattern. Since the raster scanning pattern can be formed by the combination of a single scanning mirror and a single mirror drive unit, the optical information reading apparatus is simple in construction and compact in size. In addition, the number of vertical scanning lines is not limited as opposed to a limited number of vertical scanning lines formed a polygon mirror incorporated in the conventional apparatus.
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