发明授权
- 专利标题： Line head and image forming device using the same
- 专利标题（中）： 线头和使用它的成像装置
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申请号： US12208208申请日： 2008-09-10
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公开(公告)号： US07733363B2公开(公告)日： 2010-06-08
- 发明人: Takeshi Sowa , Yujiro Nomura , Ryuta Koizumi
- 申请人： Takeshi Sowa , Yujiro Nomura , Ryuta Koizumi
- 申请人地址： JP Tokyo
- 专利权人： Seiko Epson Corporation
- 当前专利权人： Seiko Epson Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Hogan & Hartson LLP
- 优先权： JP2007-235432 20070911; JP2008-130591 20080519
- 主分类号： B41J2/45
- IPC分类号： B41J2/45
摘要：
A line head includes a lens array having a plurality of positive lens systems in a first direction. Each positive lens system has a pair of lenses with positive refractive power. A light emitter array disposed on an object side of the lens array has a plurality of light emitting elements disposed corresponding to the positive lens systems. An aperture plate forms an aperture stop on the object side of the pair of lenses. A focal distance f1 of one of the pair of lenses disposed on the object side satisfies the conditional formula f1≦d0/(1+W0/D1).
公开/授权文献
- US20090066779A1 Line Head and Image Forming Device Using the Same 公开/授权日：2009-03-12