Plastic optical element, optical scanning device, and image forming apparatus
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United States of America Patent
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Jun 4, 2013
Grant Date -
Mar 10, 2011
app pub date -
Aug 31, 2010
filing date -
Sep 8, 2009
priority date (Note) -
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Abstract
A plastic optical element for use in an optical scanning device including light effective portions that focus light, and at least one link portion that connects the light effective portions in the sub-scanning direction, the link portion forming a border arc having a curvature radius R of 2 mm or greater and contacting the light effective portions such that the tangent of the light effective portion at the connection point of the light effective portion and the border arc matches the tangent of the border arc at the connection point.
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