发明名称 |
Light beam scanning apparatus and image forming apparatus |
摘要 |
<p>Four beams are caused to scan a scanning surface in the main scanning direction in parallel. The beams expose the target area between two optical sensors, not the surface of a photosensitive drum, to produce correction data to correct shifts in the exposure positions of the four beams in the main scanning direction with an accuracy of less than a small fraction of one pixel. On the basis of the correction data, an actual image formation area is set on the photosensitive drum. This makes it possible to always control the relative exposure scanning position accurately even when the relationship between the main scanning positions of the light beams is unknown. <IMAGE></p> |
申请公布号 |
EP0930773(A2) |
申请公布日期 |
1999.07.21 |
申请号 |
EP19990100575 |
申请日期 |
1999.01.13 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
TANIMOTO, KOJI;KOMIYA, KENICHI;IDE, NAOAKI;SAKAKIBARA, JUN |
分类号 |
H04N1/047;B41J2/44;B41J2/47;G02B26/10;G03G15/04;H04N1/04;H04N1/113;H04N1/12;H04N1/191;H04N1/40;(IPC1-7):H04N1/047 |
主分类号 |
H04N1/047 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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