| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology and an optical information recording/reproducing device, capable of quickly retrieving desired retrieval information and information similar to this retrieval information from an angle multiple hologram which records a plurality of pieces of data with overlapping on the same place by changing an incident angle of reference light to an optical information recording medium. <P>SOLUTION: In a retrieval processing at the optical information recording/reproducing device which reproduces the optical information recording medium recorded by the angle multiplex, the optical information recording medium is irradiated from a route of a signal light with light added with the desired retrieval information, and an existence of the information similar to the retrieval information in the multiplex recorded information is judged by using a light quantity of diffraction light to be reproduced, and when the similar information is existent, the incident angle of the reference light optimum for reproducing the similarity and similar information is searched by using the light quantity and an emission angle of the diffraction light. <P>COPYRIGHT: (C)2012,JPO&INPIT |
