| US 7,502,046 B2 | ||
| Optical scanning unit and image forming apparatus | ||
| Yasuhiro Ono, Kyoto (Japan); Masaki Saka, Nabari (Japan); Ayumu Oda, Nara (Japan); and Takahisa Narikiyo, Yamatokoriyama (Japan) | ||
| Assigned to Sharp Kabushiki Kaisha, Osaka (Japan) | ||
| Filed on May 05, 2006, as Appl. No. 11/381,766. | ||
| Claims priority of application No. 2005-159525 (JP), filed on May 31, 2005. | ||
| Prior Publication US 2006/0268095 A1, Nov. 30, 2006 | ||
| Int. Cl. B41J 15/14 (2006.01); B41J 27/00 (2006.01) | ||
| U.S. Cl. 347—242 [347/241; 347/243; 347/256; 347/257; 347/260; 347/261] | 10 Claims |
| 1. An optical scanning unit, comprising:
a polygon mirror,
a light source emitting a plurality of different colored light beams according to image data, the plurality of light beams
irradiating the polygon mirror and the optical scanning unit converting the plurality of different colored light beams to
respective different colored scanning lights by the rotation of the polygon mirror,
a plurality of photoreceptors, the optical scanning unit scanning and exposing the plurality of photoreceptors simultaneously
with the plurality of scanning lights to form latent images on the respective photoreceptors,
optical elements irradiating the polygon mirror with each light beam configured integrally,
means for collectively adjusting the different colored light beams illuminating the polygon mirror in the main scanning direction,
and
means for adjusting the different colored light beams illuminating the polygon mirror in the sub-scanning direction.
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