HOLOGRAM RECORDING AND/OR PLAYBACK DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a hologram recording and/or playback device that can accurately detect a tilt angle of a hologram medium, and perform a correction.SOLUTION: The hologram recording and/or playback device comprises: a medium posture detection part that is composed of at least one pair of portions making a light source for emitting a light beam to a hologram medium and a light position detection part for receiving the light beam reflected from the hologram medium one pair, and the medium posture detection means is arranged at different positions in a radial direction and/or a tangential direction orthogonal to the radial direction.