|発明の名称||METHOD AND DEVICE FOR HOLOGRAPHIC RECORDING AND REPRODUCING|
PROBLEM TO BE SOLVED: To provide a method and device for holographic recording and reproducing capable of achieving high density of recording information in a recording medium.
SOLUTION: A method for recording and reproducing according to the present invention records a shift multiple recording hologram row on a track in the surface of a recording medium along a reference plane vertical to the plane including an optical axis of signal light and the optical axis of a spherical reference light by performing a shift multiple recording in one direction only for the recording medium using the spherical reference light, and after that, a plurality of shift multiple hologram rows is multiply recorded by performing a process of performing, at least one time or more, a shift multiple recording information overwriting process in which the shift multiple recording is performed on the same track on which the shift multiple hologram row is recorded, in a state of being inclined by a predetermined angle with respect to the reference plane, to record a new shift multiple hologram row.
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