Method for making optical element, and image forming apparatus
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United States of America Patent
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Apr 23, 2013
Grant Date -
Feb 24, 2011
app pub date -
Aug 12, 2010
filing date -
Aug 24, 2009
priority date (Note) -
Expired
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Abstract
A method for injection molding an imaging optical element to be used in an optical scanning apparatus for guiding a light ray in a main scanning direction and a sub-scanning direction. In the imaging optical element, the light ray passes through at least one optical functional surface and does not pass over the meridional line including the optical axis. The imaging optical element is injection-molded through an initial molding step and other various measurement and correction steps.
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