- 专利标题: PLASTIC OPTICAL ELEMENT AND OPTICAL SCANNER AND IMAGING FORMING DEVICE INCLUDING THE SAME
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申请号: US13617149申请日: 2012-09-14
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公开(公告)号: US20130070324A1公开(公告)日: 2013-03-21
- 发明人: Chieko Hatashita , Eiichi Hayashi , Go Takahashi
- 申请人: Chieko Hatashita , Eiichi Hayashi , Go Takahashi
- 优先权: JP2011-201744 20110915
- 主分类号: G02B3/08
- IPC分类号: G02B3/08 ; G02B26/10
摘要:
A plastic optical element for an optical system of an optical scanner includes a plurality of optical effective portions through which a plurality of light beams transmit, respectively, formed on at least one of an incidence surface and an exit surface in a sub scan direction, and an optical ineffective portion formed between neighboring optical effective portions not to allow the light beams to transmit therethrough, and including an area in which a local contraction occurs at a time of resin molding.