发明授权
- 专利标题： Multi-beam scanning optical system and image forming apparatus using the same
- 专利标题（中）： 多光束扫描光学系统及使用其的成像装置
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申请号： US10180079申请日： 2002-06-27
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公开(公告)号： US06914620B2公开(公告)日： 2005-07-05
- 发明人: Hiroki Yoshida , Yoshihiro Ishibe , Keiichiro Ishihara
- 申请人： Hiroki Yoshida , Yoshihiro Ishibe , Keiichiro Ishihara
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP2001-198263 20010629
- 主分类号： B41J2/44
- IPC分类号： B41J2/44 ; B41J2/47 ; G02B26/10 ; G02B26/12 ; H04N1/036 ; H04N1/113
摘要：
It is an object of the present invention to provide a multi-beam scanning optical system, which can reduce relative deviation of a writing position of each light-emitting portion due to focus deviation of a synchronization detection optical device, and an image forming apparatus using the same. In the multi-beam scanning optical system having the synchronization detection optical device including a light source device, an incident optical device, a deflection device, a scanning optical device and a slit, each element is set such that relative deviation of a writing position of each light beam due to deviation of a focus position within a main scanning cross section is reduced by a first light beam limiting element provided between the deflection device and the slit and a conditional expression is satisfied.