Light deflector and image forming apparatus including a rotating polygon mirror having displaceable reflecting surfaces
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United States of America Patent
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Feb 2, 2016
Grant Date -
Sep 3, 2015
app pub date -
Feb 26, 2015
filing date -
Feb 28, 2014
priority date (Note) -
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Abstract
In a light deflector including a polygon mirror having a plurality of reflecting surfaces; and a motor configured to rotate the polygon mirror, each of the reflecting surfaces, which has leading and trailing edges with respect to a direction of rotation of the polygon mirror and a center between the two edges, is configured to curve with the center displaced with respect to a reference straight line passing through the two edges in a plane perpendicular to an axis of rotation of the polygon mirror, radially, to a first side under a non-operating state in which the motor is not in operation, and to a second side (opposite to the first side) under a first rotating state in which progress of deformation of each of the reflecting surfaces has converged after a lapse of a first period of time from a start of rotation of the motor.
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