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    • 44. 发明申请
    • SERVO STRUCTURE IN SINGLE-BIT HOLOGRAPHIC VOLUME RECORDING AND READOUT
    • 单位全息记录和读出中的伺服结构
    • US20120170438A1
    • 2012-07-05
    • US12981293
    • 2010-12-29
    • Zhiyuan RenXiaolei ShiVictor Petrovich OstroverkhovXuefeng Wang
    • Zhiyuan RenXiaolei ShiVictor Petrovich OstroverkhovXuefeng Wang
    • G11B7/00
    • G11B7/083G11B7/08523G11B7/0956G11B2007/00656
    • Methods and systems are provided for recording micro-holograms in a holographic disk. Disk tilting or disk imperfections may cause counter-propagating recording and reference beams to deviate from the target data position in the disk. In some embodiments, a tracking beam is directed to a tracking position in the disk, and deviation of the tracking beam from the tracking position may indicate tracking and/or focusing errors of the recording and/or reference beams. A detector may generate an error signal in response to such errors. A first servo-mechanical system may actuate a first optical head (e.g., transmitting the reference and tracking beams) to compensate for such errors, and a second servo-mechanical system may actuate a second optical head (e.g., transmitting the recording beam) to follow the actuation of the first servo system, such that an interference of the reference beam and the recording beam may be maintained in the target data position.
    • 提供了用于在全息盘中记录微全息图的方法和系统。 磁盘倾斜或磁盘缺陷可能导致反向传播的记录和参考光束偏离磁盘中的目标数据位置。 在一些实施例中,跟踪光束被引导到盘中的跟踪位置,并且跟踪光束与跟踪位置的偏差可以指示记录和/或参考光束的跟踪和/或聚焦误差。 检测器可以响应于这种错误而产生误差信号。 第一伺服机械系统可以致动第一光学头(例如,传输参考和跟踪光束)以补偿这样的误差,并且第二伺服机械系统可以致动第二光学头(例如,传送记录光束)到 遵循第一伺服系统的致动,使得参考光束和记录光束的干涉可以保持在目标数据位置。