| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique where, in reproduction, the mutual phases of diffraction light obtained from a hologram recording medium and second reference light are adjusted, and to provide a phase modulating element suitably used for the phase adjustment. <P>SOLUTION: A hologram reproducing apparatus includes a first reference light path leading laser light from a laser light source 11 so that a hologram recording medium 30 is irradiated with first reference light; a diffracted light path leading diffracted light, generated from the hologram recording medium 30 by irradiation with the first reference light to a CMOS sensor 27 having a plurality of pixels; and a second reference light path leading second reference light, having the same polarization direction as that of the diffracted light from the laser light source 11 to the CMOS sensor 27. The second reference light path is provided with a phase modulating element 16 and a biaxial rolling mirror 18 so that the phase difference between the diffracted light and the second reference light is adjusted, so as to obtain DC production properties. <P>COPYRIGHT: (C)2008,JPO&INPIT |
