Patent ID: 7760408

Claim:
A hologram recording device for irradiating a recording beam to a hologram recording medium, and irradiating a reference beam to an illuminated region of the recording beam by variably controlling an incident angle of the reference beam on the hologram recording medium, whereby a hologram is recorded on the illuminated region in multiple through interference between the recording beam and the reference beam, the device comprising: at least one variable reflector directing the reference beam to the illuminated region by reflection and being swung around a predetermined axis for changing the incident angle of the reference beam; a light shield being swung integrally with the variable reflector for partially shielding the reference beam so that a luminous flux diameter of the reference beam becomes narrower as the incident angle becomes larger; and a fixed reflector for reflecting the reference beam from the variable reflector at a fixed reflecting surface; wherein the reference beam is made incident on the variable reflector in a fixed direction and with a fixed luminous flux diameter, and is irradiated to the illuminated region through the light shield after being reflected by the variable reflector and being again reflected by the fixed reflector.