Patent ID: 7502297

Claim:
A hologram recording apparatus, comprising: a rotating mechanism for rotating a hologram recording medium; a first light source for emitting first laser light; a modulator for modulating the intensity of the emitted first laser light to record a hologram on the hologram recording medium; a second light source for emitting second laser light with which a predetermined signal pattern is read from the rotating hologram recording medium, the predetermined signal pattern being used to apply the modulated first laser light to a target recording region on the hologram recording medium; and control means for exerting control on the basis of the read signal pattern so that the intensity of the first laser light is modulated by the modulator while the first laser light is being oscillated and so that a beam spot of the first laser light is applied onto the hologram recording medium in periods in which the relative velocity between the target recording region on the rotating hologram recording medium and the beam spot of the first laser light becomes almost zero.