Invention Grant
- Patent Title: Plastic optical element, optical scanning device, and image forming apparatus
- Patent Title (中): 塑料光学元件，光学扫描装置和成像装置
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Application No.: US12872334Application Date: 2010-08-31
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Publication No.: US08457530B2Publication Date: 2013-06-04
- Inventor: Eiichi Hayashi , Takamichi Ohhashi , Go Takahashi , Kan Aoki
- Applicant: Eiichi Hayashi , Takamichi Ohhashi , Go Takahashi , Kan Aoki
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2009-206684 20090908
- Main IPC: G03G15/04
- IPC: G03G15/04 ; G02B26/08 ; G02B26/10 ; G02B26/12 ; G02B7/02
Abstract:
A plastic optical element for use in an optical scanning device including light effective portions that focus light, and at least one link portion that connects the light effective portions in the sub-scanning direction, the link portion forming a border arc having a curvature radius R of 2 mm or greater and contacting the light effective portions such that the tangent of the light effective portion at the connection point of the light effective portion and the border arc matches the tangent of the border arc at the connection point.
Public/Granted literature
- US20110058853A1 PLASTIC OPTICAL ELEMENT, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPARATUS Public/Granted day:2011-03-10
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