HOLOGRAM RECORDING/REPRODUCING DEVICE, HOLOGRAM RECORDING/REPRODUCING METHOD, AND HOLOGRAM RECORDING MEDIUM

摘要

The hologram recording/reproducing apparatus is for recording a hologram by emitting a recording beam (S) modulated by a spatial light modulator and a reference beam (R) having a same wavelength as the recording beam onto a hologram recording medium (B) so that the beams overlap each other with polarization direction (p) of the beams being matched to interfere with each other, and for reproducing the hologram by exposing the hologram recording medium storing the hologram to the reference beam to generate diffracted light and receiving the diffracted light by an imaging device. The spatial light modulator is controlled so as to form a data area (H0) corresponding to information to be recorded and a plurality of mark areas (H1) for detecting a position of the data area in the hologram recording medium (B) in recording of the hologram. The mark areas (H1) are formed at positions not to be overlapped by a beam scattering region which may be generated along a polarizing direction (p) of the reference beam on an outward side of the data area (H0).