发明申请
- 专利标题： Line Head and Image Forming Apparatus Using the Same
- 专利标题（中）： 线头和图像形成装置使用它
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申请号： US12194391申请日： 2008-08-19
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公开(公告)号： US20090052943A1公开(公告)日： 2009-02-26
- 发明人: Takeshi SOWA , Yujiro NOMURA , Ryuta KOIZUMI , Ken IKUMA
- 申请人： Takeshi SOWA , Yujiro NOMURA , Ryuta KOIZUMI , Ken IKUMA
- 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
- 优先权： JP2007-213530 20070820; JP2008-130590 20080519
- 主分类号： G03G15/043
- IPC分类号： G03G15/043 ; G02B27/10
摘要：
A line head includes: a positive lens system having two lenses with positive refractive power; a lens array in which a plurality of the positive lens systems are arrayed in a first direction; a light emitter array in which a plurality of light-emitting elements are arrayed on an object side of the lens array so as to correspond to the one positive lens system; and an aperture plate that forms an aperture diaphragm at the position of an object-side focal point of the positive lens system. An object-side surface of an object-side lens of the positive lens system is positioned close to the object-side focal point.