A holographic recording medium includes a holographic recording carrier
including a first light transmittable substrate, a second light
transmittable substrate and a holographic recording layer sandwiched
therebetween, a first antireflection film formed on the surface of the
first light transmittable substrate and a second antireflection film
formed on the surface of the second light transmittable substrate, and
optical characteristics of the first antireflection film and those of the
second antireflection film are determined to be different from each other
the thus constituted holographic recording medium can achieves improved
data recording characteristics and data reproducing characteristics using
an object beam and a reference beam, and concurrently enables desired
positioning of an object beam and a reference beam, or only the reference
beam, and detection of the address of the region in which data are being
recorded or from which data are being reproduced using a position control
beam.