发明授权
- 专利标题: Holographic storage using shift multiplexing
- 专利标题(中): 全息存储使用移位复用
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申请号: US889797申请日: 1997-07-08
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公开(公告)号: US5949558A公开(公告)日: 1999-09-07
- 发明人: Demetri Psaltis , Michael J. Levene , Allen Pu , George Barbastathis
- 申请人: Demetri Psaltis , Michael J. Levene , Allen Pu , George Barbastathis
- 申请人地址: CA Pasadena
- 专利权人: California Institute of Technology
- 当前专利权人: California Institute of Technology
- 当前专利权人地址: CA Pasadena
- 主分类号: G03H1/26
- IPC分类号: G03H1/26 ; G11B7/0065
摘要:
The invention is embodied in a method of recording successive holograms in a recording medium, using at least a fan of M waves along at least a first axis with a separation angle between adjacent waves and directing the fan of M waves as a reference beam along a reference beam path onto the recording medium, successively modulating a wave with a succession of images to produce a succession of signal beams along a signal beam path lying at a propagation angle relative to the reference beam path so that the signal and reference beams intersect at abeam intersection lying within the medium, the beam intersection having a size corresponding to beam areas of the reference and signal beams, producing a succession of relative displacements in a direction parallel to the first axis between the recording medium and the beam intersection of the signal and reference beam paths in synchronism with the succession of signal beams, each of the displacements being less than the size of the intersection whereby to record successive holograms partially overlapped along a direction of the displacements.
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