发明授权
US08441512B2 Optical scanner and image forming apparatus addressing uneven birefringence distribution of a scanning lens
有权
解决扫描透镜不均匀双折射分布的光学扫描仪和图像形成装置
- 专利标题： Optical scanner and image forming apparatus addressing uneven birefringence distribution of a scanning lens
- 专利标题（中）： 解决扫描透镜不均匀双折射分布的光学扫描仪和图像形成装置
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申请号： US13042935申请日： 2011-03-08
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公开(公告)号： US08441512B2公开(公告)日： 2013-05-14
- 发明人: Hibiki Tatsuno , Daisuke Ichii , Nobuyuki Arai
- 申请人： Hibiki Tatsuno , Daisuke Ichii , Nobuyuki Arai
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Company, Limited
- 当前专利权人： Ricoh Company, Limited
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权： JP2010-055509 20100312
- 主分类号： B41J15/14
- IPC分类号： B41J15/14 ; B41J27/00
摘要：
An optical scanner includes a light source, a deflector and a scanning optical system. The scanning optical system includes a first optical system including at least one resin scanning lens, and a second optical system between the target surface and one resin scanning lens. The second optical system includes at least one of a folding mirror(s) and a glass sheet(s), wherein m1+g2=m2+g1 is satisfied wherein m1 and g1 are respectively number of the folding mirror(s) and number of the glass sheet(s) to which the first ray has a shorter optical path than the second ray does, m2 and g2 are respectively number of the folding mirror(s) and number of the glass sheet(s) to which the first ray has a longer optical path than the second ray does.
公开/授权文献
- US20110221857A1 OPTICAL SCANNER AND IMAGE FORMING APPARATUS 公开/授权日：2011-09-15
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