| 摘要 |
A holographic memory device includes: a hologram memory part for information recording by using a reference beam and an object beam, the hologram memory part having a plurality of cells; a first optical path modifying part having a fine adjustment element that adjusts the reference beam's path so as to be incident on the hologram memory part at a specific angle for information recording and reconstructing, and that adjusts the reference beam's path so as to be incident on the hologram memory part at a desired angle for information reconstructing when an angle of incidence of reference beam for information reconstructing doesn't coincide with that of reference beam for information recording; and a second optical path modifying part that adjusts the object beam's path so as to be incident on the hologram memory part for information recording. Even though physical shaking occurs on recording medium or the recording medium is replaced after information recording on the hologram memory part, the information recorded can be accurately reconstructed.
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