发明名称 |
HOLOGRAPHIC MEMORY REPRODUCTION DEVICE AND HOLOGRAPHIC MEMORY REPRODUCTION METHOD, DEMODULATION DEVICE AND DEMODULATION METHOD, AND OBSERVATION DEVICE AND OBSERVATION METHOD |
摘要 |
The present invention relates to a reproduction device of a holographic memory capable of precisely reproducing multi-value phase information without being influenced by noise. This holographic memory reproduction device comprises: a hologram diffraction ray generation unit which irradiates a first reference ray to the holographic memory and generates a diffraction ray of the first hologram; a hologram generation unit which changes the phase of a second reference ray which may interfere with the diffraction ray of the first hologram and generates a second hologram from the diffraction ray of the first hologram and the second reference ray to which the phase has been changed; a detection unit which detects the intensity distribution of the second hologram; and a processing unit which demodulates the phase modulation signal or the space quadrature amplitude modulation signal on the basis of the intensity distribution. |
申请公布号 |
KR20140008302(A) |
申请公布日期 |
2014.01.21 |
申请号 |
KR20137010069 |
申请日期 |
2011.10.19 |
申请人 |
NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY |
发明人 |
OKAMOTO ATSUSHI;KUNORI KEISUKE;TAKABAYASHI MASANORI |
分类号 |
G11B7/0065;G03H1/22 |
主分类号 |
G11B7/0065 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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