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    • 11. 发明申请
    • POSITION CALIBRATION OF A HOLOGRAPHIC STORAGE MEDIUM
    • 全息存储介质的位置校准
    • WO2011018359A1
    • 2011-02-17
    • PCT/EP2010/061098
    • 2010-07-30
    • THOMSON LICENSINGMALKI, OliverPRZYGODDA, Frank
    • MALKI, OliverPRZYGODDA, Frank
    • G11B7/085G11B7/007G11B7/08G11B7/0065
    • G11B7/083G11B7/0065G11B7/00781G11B7/085
    • The present invention relates to a method for calibrating the position of a holographic storage medium (16) in the direction of an optical axis (A) in an apparatus (1) for reading from and/or writing to holographic storage media (16), and to an apparatus (1) for reading from and/or writing to holographic storage media (16), which makes use of such a method. According to the invention, for calibrating the position of the holographic storage medium (16) the following steps are performed: - recording or locating (40) a test hologram in the holographic storage medium (16); - determining (50) the dependency of the diffraction efficiency of the test hologram on a shift of a reference beam wavefront relative to the recorded hologram; and - adjusting (60) the position of the holographic storage medium (16) responsive to the determined dependency.
    • 本发明涉及一种用于在全息存储介质(16)读取和/或写入装置(1)中校准全息存储介质(16)在光轴(A)方向上的位置的方法, 以及使用这种方法的用于从全息存储介质(16)读取和/或写入的装置(1)。 根据本发明,为了校准全息存储介质(16)的位置,执行以下步骤: - 在全息存储介质(16)中记录或定位(40)测试全息图; - 确定(50)测试全息图的衍射效率对参考光束波前相对于所记录的全息图的偏移的依赖性; 以及 - 响应于所确定的依赖性来调整(60)全息存储介质(16)的位置(60)。