A hologram recording apparatus includes a laser light source for emitting
laser light, a light splitter for splitting the laser light emitted from
the laser light source into a signal beam and a reference beam, a light
modulator for modulating the signal beam split by the light splitter, a
phase modulator for phase-modulating the reference beam split by the
light splitter, an optical system for collecting the signal beam
modulated by the light modulator and the reference beam phase-modulated
by the phase modulator onto almost the same collecting position on a
hologram recording medium, a collecting-position control mechanism for
controlling the collecting position along a surface of the hologram
recording medium, and a distance control mechanism for controlling the
distance between the phase modulator and the hologram recording medium.