Optical scanning unit and image forming apparatus using same
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United States of America Patent
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Feb 26, 2013
Grant Date -
Sep 18, 2008
app pub date -
Mar 14, 2008
filing date -
Mar 16, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
An optical scanning unit used in an image forming apparatus having a latent image carrier includes a light emitter, a rotary deflector, an inclination adjustment unit, and a controller. The light emitter emits a light beam. The rotary deflector deflects and scans the light beam onto a surface of the latent image carrier. The inclination adjustment unit adjusts an inclination of a scan line corresponding to the light beam relative to a reference scan line on the latent image carrier. The controller changes at least one of a linear velocity of the latent image carrier and a rotation speed of the rotary deflector so as to change a ratio between the linear velocity of the latent image carrier and a scan speed of the light beam, and controls the inclination adjustment unit based on the ratio to keep the scan line from inclining relative to the reference scan line.
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