发明授权
- 专利标题： Optical pickup unit and information recording/reproduction apparatus
- 专利标题（中）： 光学拾取单元和信息记录/再现装置
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申请号： US11344956申请日： 2006-01-31
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公开(公告)号： US07668064B2公开(公告)日： 2010-02-23
- 发明人: Nobuaki Kaji , Sumitaka Maruyama , Akihito Ogawa , Kazuo Watabe
- 申请人： Nobuaki Kaji , Sumitaka Maruyama , Akihito Ogawa , Kazuo Watabe
- 申请人地址： JP Tokyo
- 专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人地址： JP Tokyo
- 代理机构： Knobbe Martens Olson & Bear, LLP
- 优先权： JP2005-024481 20050131
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
According to one embodiment, an optical pickup unit which can record, reproduction and erase information in/from an information recording medium has tracks with different pitches, the dividing means has at least a part of a dividing boundary line placing between an end of a 1st order diffraction light with the largest diffraction angle and an end of a 1st order diffraction light with the smallest diffraction angle of the reflected laser beam.
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