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    • 4. 发明申请
    • METHOD AND DEVICE FOR COMPENSATING TILT OF AN OPTICAL DATA CARRIER
    • 用于补偿光数据载波的倾斜的方法和装置
    • WO2005036540A3
    • 2005-06-02
    • PCT/IB2004003240
    • 2004-10-01
    • KONINKL PHILIPS ELECTRONICS NVTUKKER TEUNISANDERSEN OLELIEDENBAUM COEN
    • TUKKER TEUNISANDERSEN OLELIEDENBAUM COEN
    • G11B7/095G11B7/135
    • G11B7/13927G11B7/0956G11B7/1353
    • The invention relates to a method of and a device for compensating tilt of an optical or magneto-optical disc (1) exhibiting unknown tilt when placed in an apparatus for reading and/or writing data from and/or onto the optical or magneto-optical disc. A holographic optical element (23) containing a plurality of holograms each defining a phase profile able to compensate at least a specific coma amount is placed in a light path of an optical read/write unit (4) of the apparatus. The amount of tilt of the disc or coma introduced by the tilt is detected (14, 21), and a hologram defining a phase profile corresponding to the detected amount of tilt or coma is selected and accessed among the plurality of holograms of the holographic optical element for compensating the detected amount of tilt or coma. The invention applies to any type of optical data carrier such as so-called LD, CD, R-CD, DVD, DVD+R, DVD+RW, DVD-RW, DVR (Blue Ray).
    • 本发明涉及一种用于补偿显示未知倾斜的光学或磁光盘(1)的倾斜的方法和装置,当放置在用于从光学或磁光学上读取和/或写入数据的装置中时 光盘。 包含多个全息图的全息光学元件(23)被放置在装置的光学读取/写入单元(4)的光路中,每个全息图限定能够补偿至少特定的彗差量的相位分布。 检测由倾斜引起的盘或彗差的倾斜量(14,21),并且在全息光学的多个全息图中选择和访问定义与检测到的倾斜或彗差量对应的相位轮廓的全息图 用于补偿检测到的倾斜或昏迷量的元件。 本发明适用于任何类型的光数据载体,例如所谓的LD,CD,R-CD,DVD,DVD + R,DVD + RW,DVD-RW,DVR(蓝光)。