发明授权
- 专利标题： Optical pickup apparatus and tilt amount detecting method
- 专利标题（中）： 光拾取装置和倾斜量检测方法
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申请号： US09921308申请日： 2001-08-03
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公开(公告)号： US06865144B2公开(公告)日： 2005-03-08
- 发明人: Takuma Yanagisawa , Yoshitsugu Araki , Takanori Maeda , Masayuki Iwasaki
- 申请人： Takuma Yanagisawa , Yoshitsugu Araki , Takanori Maeda , Masayuki Iwasaki
- 申请人地址： JP Tokyo
- 专利权人： Pioneer Corporation
- 当前专利权人： Pioneer Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Morgan, Lewis & Bockius LLP
- 优先权： JP2000-237691 20000804
- 主分类号： G11B7/095
- IPC分类号： G11B7/095 ; G11B7/13 ; G11B7/00
摘要：
An optical pickup apparatus includes a photodetector for receiving a diffracted light reflected from the recording medium; and a tilt detector for detecting a tilt amount of the recording medium on the basis of a light intensity within an interference region of a 0th-order diffraction light and at least one diffraction light other than the 0th-order diffraction light of the reflected light received by the photodetector.
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