Invention Grant
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
- Patent Title: Optical scanner and image forming apparatus addressing uneven birefringence distribution of a scanning lens
- Patent Title (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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Application No.: US13042935Application Date: 2011-03-08
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Publication No.: US08441512B2Publication Date: 2013-05-14
- Inventor: Hibiki Tatsuno , Daisuke Ichii , Nobuyuki Arai
- Applicant: Hibiki Tatsuno , Daisuke Ichii , Nobuyuki Arai
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Limited
- Current Assignee: Ricoh Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2010-055509 20100312
- Main IPC: B41J15/14
- IPC: B41J15/14 ; B41J27/00
Abstract:
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.
Public/Granted literature
- US20110221857A1 OPTICAL SCANNER AND IMAGE FORMING APPARATUS Public/Granted day:2011-09-15
Information query
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