发明申请
- 专利标题： OPTICAL HEAD AND OPTICAL DISC DEVICE
- 专利标题（中）： 光头和光盘设备
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申请号： US12293291申请日： 2007-03-19
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公开(公告)号： US20090046564A1公开(公告)日： 2009-02-19
- 发明人: Fumitomo Yamasaki , Hideki Aikoh , Akihiro Arai
- 申请人： Fumitomo Yamasaki , Hideki Aikoh , Akihiro Arai
- 优先权： JP2006-076315 20060320
- 国际申请： PCT/JP2007/055462 WO 20070319
- 主分类号： G11B7/135
- IPC分类号： G11B7/135
摘要：
In an optical head (10) used for an optical disc (30) in which light-transmitting layers largely change in thickness, a degree-of-diversion/convergence enlarging member (20) fixed between a collimating lens (4) and an objective lens (6) is arranged. With this configuration, a moving range of the collimating lens can be reduced, and the optical head can be miniaturized.
公开/授权文献
- US08325581B2 Optical head and optical disc device 公开/授权日：2012-12-04
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