| 摘要 |
PROBLEM TO BE SOLVED: To provide an image information retrieval system fast in retrieval speed upon retrieving image information recorded by using a holography. SOLUTION: A hologram 24 is recorded in a hologram recording layer 21 of a holographic recording medium 20, the hologram formed by allowing reference light to interfere with information light that is spatially modulated by two-dimensional pattern information. A retrieval light is generated by spatially modulating light exiting from a CW laser 54 by two-dimensional pattern information for retrieval; the retrieval light is allowed to irradiate the hologram recorded in the hologram recording layer; intensity of reproduced light from the hologram of the recording medium is detected by a reproduced light detector 59; and the two-dimensional pattern information for recording is verified with the two-dimensional pattern information for retrieval by using the intensity value of the reproduced light. COPYRIGHT: (C)2009,JPO&INPIT
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