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公开(公告)号：EP1829031B1
公开(公告)日：2008-12-17
申请号：EP05850557.9
申请日：2005-12-20
IPC分类号： G11B7/0065 , G11B7/24
CPC分类号： G11B7/0065 , G11B7/24044
摘要： The invention concerns the field of holographic storage units. More particularly, the invention concerns the field of holographic storage units used for bit-by-bit storage of information. It concerns a method for reading data recorded in a holographic material in the form of a hologram obtained by interference of two beams of substantially the same wavelength, and using at least one reflecting layer. The invention is characterized in that it includes the following steps: emitting a light comprising at least said wavelength at said holographic material comprising said hologram; performing a homodyne detection between the signal resulting from the first light diffracted by said hologram and at least one signal selected between the reflected signal and the signal transmitted by said at least one reflecting layer.
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公开(公告)号：EP1829031A1
公开(公告)日：2007-09-05
申请号：EP05850557.9
申请日：2005-12-20
IPC分类号： G11B7/0065 , G11B7/24
CPC分类号： G11B7/0065 , G11B7/24044
摘要： The invention concerns the field of holographic storage units. More particularly, the invention concerns the field of holographic storage units used for bit-by-bit storage of information. It concerns a method for reading data recorded in a holographic material in the form of a hologram obtained by interference of two beams of substantially the same wavelength, and using at least one reflecting layer. The invention is characterized in that it includes the following steps: emitting a light comprising at least said wavelength at said holographic material comprising said hologram; performing a homodyne detection between the signal resulting from the first light diffracted by said hologram and at least one signal selected between the reflected signal and the signal transmitted by said at least one reflecting layer.
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