Optical scanning apparatus having a fixed compound reflective assembly for two-dimensional scan capability and method thereof
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United States of America Patent
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Jun 3, 1997
Grant Date -
N/A
app pub date -
Jun 14, 1995
filing date -
Jun 14, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
An optical scanner with high optical scanning speed without low optical information detection accuracy and which has superior shock and vibration resistance because of its light weight has a scanner used for directing the reflected light to a light receiving element during optical scanning of an object to be read. The scanner has an optical scanning mirror and multiple light receiving mirrors placed at the sides of the scanning member. Each of the mirrors are mounted on a base, through supporting columns and beams so that they can be displaced in two-dimensional directions. Also, electrodes are provided opposite each of the mirrors on the base. Then, by generating electrostatic force through the application of electric voltage between the electrodes and the mirrors, the optical scanning mirror is displaced in the optical scanning direction with all of the reflective sides of each of the light receiving mirrors displaced to form a convex shape that always direct the reflected light to the light receiving element. As a result, optical scanning can be performed at a high speed with miniaturization of the apparatus possible.
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