Optical scanning apparatus and image forming apparatus
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United States of America Patent
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Aug 12, 2014
Grant Date -
May 23, 2013
app pub date -
Nov 19, 2012
filing date -
Nov 22, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An optical scanning apparatus, including: a light source; an incident optical system; and an imaging optical system, in which: the imaging optical system includes at least one plastic lens; in a sub-scanning section, principal rays of the beams intersect each other on an optical axis of the imaging optical system; the principal rays intersect each other at different positions between a case of entering a central region of the at least one plastic lens and a case of entering an end region of the at least one plastic lens; and the principal rays entering one of the central region and the end region of the at least one plastic lens intersect each other, and the principal rays entering another of the central region and the end region of the at least one plastic lens intersect each other.
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