Optical scanning device and image forming apparatus
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United States of America Patent
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May 21, 2013
Grant Date -
Aug 6, 2009
app pub date -
Jan 23, 2009
filing date -
Feb 6, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A deflector deflects a light beam emitted from a light source including a plurality of light-emitting units. A scanning optical system focuses the light beam deflected by the deflector on a scanning target surface. A monitoring photoreceiver receives a part of a light beam deflected by the deflector and directed toward an area within a scanning area outside an image area. A detecting unit individually detects emission powers of at least two light-emitting units based on an output signal of the monitoring photoreceiver in a single sweep of scanning.
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