Patent ID: 7751105
Filing Date: 2010-07-06
Classification: G03H,G11B

Abstract:
1. A hologram recorder configured to apply a recording beam to a hologram recording medium and apply a reference beam to an illumination site of the recording beam on the hologram recording medium, the recorder recording holograms in multiple at the illumination site by interference of the recording beam and the reference beam, the hologram recorder comprising: a recording-purpose reference beam reflector for reflecting the reference beam after the reference beam has come along a predetermined optical path for recording, the reflected reference beam being directed to the illumination site; and a pivot mechanism for pivoting the recording-purpose reference beam reflector about a predetermined axis so as to vary an incident angle of the reflected reference beam with respect to the hologram recording medium; wherein the recording-purpose reference beam reflector is disposed to cross the predetermined optical path, and the predetermined axis for the pivot mechanism is disposed to direct the reflected reference beam toward the illumination site even when the recording-purpose reference beam reflector is pivoted to vary an incident angle of the reflected reference beam, wherein the hologram recorder further comprises a reproduction-purpose reference beam reflector for reflecting the reference beam after the reference beam has come along a predetermined optical path for reproducing, the reflected reference beam being directed to the illumination site through a side of the hologram recording medium which is opposite in position to the recording-purpose reference beam reflector, the pivot mechanism being configured to pivot the recording-purpose and the reproduction-purpose reference beam reflectors together about the predetermined axis.