发明授权
- 专利标题： Tracking error detecting method, tracking error detecting apparatus and optical recording and reproducing apparatus
- 专利标题（中）： 跟踪误差检测方法，跟踪误差检测装置和光学记录和再现装置
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申请号： US11585774申请日： 2006-10-25
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公开(公告)号： US07764575B2公开(公告)日： 2010-07-27
- 发明人: Yoshiki Okamoto
- 申请人： Yoshiki Okamoto
- 申请人地址： JP Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Rader Fishman & Grauer PLLC
- 优先权： JP2005-322600 20051107
- 主分类号： G11B7/08
- IPC分类号： G11B7/08
摘要：
A tracking error detecting method comprises the steps of causing intensity distributions of single light introduced into an objective lens to have symmetry with respect to the track direction of an optical recording medium and the direction oblique to the direction perpendicular to the track direction, dividing a light-receiving unit into at least light-receiving units of the track direction and light-receiving units of the direction perpendicular to the track direction and detecting a tracking error signal based on detection signals from the divided light-receiving units.
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