HOLOGRAM REPRODUCTION DEVICE AND HOLOGRAM REPRODUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To achieve high-quality reproduction while maintaining a high transfer speed in a hologram optical information reproduction device in which a reference light angle is varied by combining two optical elements, even when an orthogonal angle is misaligned in both optical elements due to a mounting error or the like.SOLUTION: A hologram reproduction device is provided, which includes: a first light angle varying unit that varies an irradiation angle of reference light on a recording medium within a plane including an optical axis of signal light and a normal line of the recording medium; a second light angle varying unit that varies an irradiation angle of the reference light within a plane substantially perpendicular to the plane including the optical axis of the signal light and the normal line of the recording medium; and a light angle interpolation processing unit that interpolates a control target value of the first light angle control unit and outputs the interpolated control target value to the second light angle control unit so as to control a control target value of the second light angle control unit.SELECTED DRAWING: Figure 1