发明申请
US20090138901A1 OPTICAL PICKUP, OPTICAL ELEMENT, OPTICAL INFORMATION DEVICE, COMPUTER, OPTICAL INFORMATION MEDIUM PLAYER, CAR NAVIGATION SYSTEM, OPTICAL INFORMATION MEDIUM RECORDER AND OPTICAL DISK SERVER
有权
光学拾取，光学元件，光学信息设备，计算机，光学信息媒体播放器，导航系统，光信息媒体记录器和光盘服务器
- 专利标题： OPTICAL PICKUP, OPTICAL ELEMENT, OPTICAL INFORMATION DEVICE, COMPUTER, OPTICAL INFORMATION MEDIUM PLAYER, CAR NAVIGATION SYSTEM, OPTICAL INFORMATION MEDIUM RECORDER AND OPTICAL DISK SERVER
- 专利标题（中）： 光学拾取，光学元件，光学信息设备，计算机，光学信息媒体播放器，导航系统，光信息媒体记录器和光盘服务器
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申请号： US12280812申请日： 2007-02-27
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公开(公告)号： US20090138901A1公开(公告)日： 2009-05-28
- 发明人: Toshiyasu Tanaka , Yoshiaki Komma , Kousei Sano , Hidenori Wada , Keiichi Matzuzaki , Kanji Wakabayashi
- 申请人： Toshiyasu Tanaka , Yoshiaki Komma , Kousei Sano , Hidenori Wada , Keiichi Matzuzaki , Kanji Wakabayashi
- 申请人地址： JP Osaka
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JP Osaka
- 优先权： JP2006-054071 20060228
- 国际申请： PCT/JP2007/053660 WO 20070227
- 主分类号： G11B7/135
- IPC分类号： G11B7/135 ; G11B7/00 ; G01C21/00 ; G09G5/00
摘要：
An optical pickup includes: a laser light source which outputs an divergent beam having an elliptical far-field pattern; a beam shaping element having at least one cylindrical plane and which shapes the divergent beam outputted from the laser light source into an divergent beam having a prescribed shape in which at least the length in the major axis direction of the elliptical shape is shortened; a light collecting portion having a beam splitter which perpendicularly collects the divergent beam that is outputted from the beam shaping element and which has a prescribed shape on the recording surface of an optical disk, and a mirror or the like; and a light detecting portion The optical axis of the divergent beam is rotated so that the direction in which the major axis of the divergent beam having a prescribed shape is shortened conforms to the radial direction of an optical information recording medium.
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