| 摘要 |
A holographic recording/reproducing apparatus controls a position and an area size of a signal light and/or a reference light in a holographic recording medium by a spatial light amplitude modulator. Thus, the holographic recording/reproducing apparatus can set the position and the area size of the signal light and/or the reference light arbitrarily by using a spatial light amplitude modulator of high resolution as the spatial light amplitude modulator. Further, by controlling the position of the reference light by the spatial light amplitude modulator, the holographic recording/reproducing apparatus can change the incident angle on the holographic recording medium. Angle multiplex recording can thus be realized.
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