发明授权
US07116619B2 Optical disc drive apparatus, method for measuring tilt of an optical disc, and method for correcting tilt of an optical disc
有权
光盘驱动装置，用于测量光盘倾斜的方法以及用于校正光盘倾斜的方法
- 专利标题： Optical disc drive apparatus, method for measuring tilt of an optical disc, and method for correcting tilt of an optical disc
- 专利标题（中）： 光盘驱动装置，用于测量光盘倾斜的方法以及用于校正光盘倾斜的方法
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申请号： US10521867申请日： 2003-06-26
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公开(公告)号： US07116619B2公开(公告)日： 2006-10-03
- 发明人: Ole Klembt Andersen , Jacobus M. Den Hollander
- 申请人： Ole Klembt Andersen , Jacobus M. Den Hollander
- 申请人地址： NL Eindhoven
- 专利权人： Koninklijke Philips Elelctronics N.V.
- 当前专利权人： Koninklijke Philips Elelctronics N.V.
- 当前专利权人地址： NL Eindhoven
- 代理商 Michael E. Belk
- 优先权： EP02078075 20020726
- 国际申请： PCT/IB03/02810 WO 20030626
- 国际公布： WO2004/015700 WO 20040219
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
Tilt (θ(r, φ)) is measured in a measuring location (P(r, φ) optical disc (2). A pivotable objective lens (34) is brought to a first focus measuring location such as to focus a light beam (32) in a first anchor point (P1(r−Δr1, φ))having the same angular coordinate φ as said measuring location (P(r, φ)) and having a small radial distance Δr1 from said measuring location. The objective lens is brought to a second focus measuring location such as to focus the light beam in a second anchor point (P2(r+Δr2, φ)) having the same angular coordinate φ as said measuring location and having a small radial distance Δr2 from said measuring location, wherein said first and second anchor pints are located on opposite sides of said measuring location. Tilt in said measuring location is calculated from the coordinates of said two focus measuring locations of said objective lens.
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