Hologram recording apparatus, hologram reproducing apparatus, hologram recording method, and hologram reproducing method

A hologram recording apparatus includes 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, and a controller operable to exert 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 and the beam spot becomes almost zero.