Optical scanning device in image forming apparatus, and control method thereof
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United States of America Patent
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May 5, 2015
Grant Date -
Nov 27, 2008
app pub date -
May 22, 2008
filing date -
May 22, 2007
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Abstract
An optical scanning device which forms a plurality of scanning lines in parallel in a main scanning direction on a photosensitive member by a plurality of laser beams detects the curvature values in the sub-scanning direction of the scanning lines, and corrects a curvature value in the sub-scanning direction corresponding to each of the scanning lines. When detecting the curvature value, the optical scanning device detects the curvature values in the sub-scanning direction of two scanning lines, and calculates the curvature value in the sub-scanning direction of a scanning line between the two scanning lines based on the detected curvature values in the sub-scanning direction of the two scanning lines. With this arrangement, the curvatures in the sub-scanning direction of scanning lines are corrected effectively with high accuracy for all laser beams in a multi-beam optical scanning device using a VCSEL or the like.
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
- CANON KABUSHIKI KAISHA
International Classification(s)
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- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Iwai, Hitoshi | Abiko, JP | 75 | 573 |
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