Invention Application
- Patent Title: SERVO STRUCTURE IN SINGLE-BIT HOLOGRAPHIC VOLUME RECORDING AND READOUT
- Patent Title (中): 单位全息记录和读出中的伺服结构
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Application No.: US12981293Application Date: 2010-12-29
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Publication No.: US20120170438A1Publication Date: 2012-07-05
- Inventor: Zhiyuan Ren , Xiaolei Shi , Victor Petrovich Ostroverkhov , Xuefeng Wang
- Applicant: Zhiyuan Ren , Xiaolei Shi , Victor Petrovich Ostroverkhov , Xuefeng Wang
- Applicant Address: US NY Schenectady
- Assignee: GENERAL ELECTRIC COMPANY
- Current Assignee: GENERAL ELECTRIC COMPANY
- Current Assignee Address: US NY Schenectady
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
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.
Public/Granted literature
- US08315139B2 Servo structure in single-bit holographic volume recording and readout Public/Granted day:2012-11-20
Information query
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