| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical information recording/reproducing device capable of eliminating aligning between a spatial light modulation element and a light receiving element and an expensive relay lens system, and obtaining a reproducing signal with good S/N simultaneously with reductions in cost and size of an optical system. <P>SOLUTION: When information is recorded or reproduced to/from a hologram disk by using a holographic memory technology, a spatial light modulation element SLM and a light receiving element (CMOS sensor or the like) are formed on the same substrate, and a shifting means 124 for performing parallel shift of parallel luminous fluxes made incident on the spatial light modulation element and the light receiving element is provided. The shifting means 124 switches the state of not shifting the parallel luminous fluxes and the state of shifting the parallel luminous fluxes between the recording time and the reproducing time of information to/from the hologram disk 118. <P>COPYRIGHT: (C)2007,JPO&INPIT |
