发明申请
- 专利标题: SERVO STRUCTURE IN SINGLE-BIT HOLOGRAPHIC VOLUME RECORDING AND READOUT
- 专利标题(中): 单位全息记录和读出中的伺服结构
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申请号: US12981293申请日: 2010-12-29
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公开(公告)号: US20120170438A1公开(公告)日: 2012-07-05
- 发明人: Zhiyuan Ren , Xiaolei Shi , Victor Petrovich Ostroverkhov , Xuefeng Wang
- 申请人: Zhiyuan Ren , Xiaolei Shi , Victor Petrovich Ostroverkhov , Xuefeng Wang
- 申请人地址: US NY Schenectady
- 专利权人: GENERAL ELECTRIC COMPANY
- 当前专利权人: GENERAL ELECTRIC COMPANY
- 当前专利权人地址: US NY Schenectady
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
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.
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