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    • 3. 发明申请
    • MEDIUM POSITION SENSING
    • 中位置感测
    • WO2005052926A1
    • 2005-06-09
    • PCT/US2003/034560
    • 2003-10-29
    • INPHASE TECHNOLOGIES, INC.AYRES, Mark, R.LIPNEY, Michael, J.MALANG, Keith, W.GOODKNIGHT, Curt, J.
    • AYRES, Mark, R.LIPNEY, Michael, J.MALANG, Keith, W.GOODKNIGHT, Curt, J.
    • G11B3/90
    • G11B7/0065
    • A method of determining coordinates for a storage medium (610) includes: determining diffraction data from a plurality of diffraction patterns corresponding to diffractive markers (605-608) of the medium (610); and combining the diffraction data to determine composite coordinates for the medium (610). The composite coordinates may include three translational coordinates and three rotational coordinates. The act of determining diffraction data may include shining a plurality of beams (601-604) on a selection of the diffractive markers (605-608), and measuring the corresponding diffraction patterns in one or more photodetectors (609) to determine the diffraction data. In this latter case the photodetectors (609) may be segmented. The act of combining the diffraction data to determine composite coordinates may include solving a matrix system that couples the diffraction data and the composite coordinates. Each diffractive marker (605-608) may include a pit. The storage medium (610) may include a holographic storage medium.
    • 确定存储介质(610)的坐标的方法包括:从对应于介质(610)的衍射标记(605-608)的多个衍射图案确定衍射数据; 以及组合所述衍射数据以确定所述介质的复合坐标(610)。 复合坐标可以包括三个平移坐标和三个旋转坐标。 确定衍射数据的行为可以包括在选择衍射标记(605-608)上照射多个光束(601-604),以及测量一个或多个光电检测器(609)中的相应衍射图案以确定衍射数据 。 在后一种情况下,光电检测器(609)可以被分段。 组合衍射数据以确定复合坐标的动作可以包括求解耦合衍射数据和复合坐标的矩阵系统。 每个衍射标记(605-608)可包括凹坑。 存储介质(610)可以包括全息存储介质。