Patent ID: 7672031

Claim:
A hologram recording medium adapted to record data thereon as a plurality of element holograms such that data recorded on each one of the plurality of element holograms is an image of two-dimensional page data, object light of the image of the two-dimensional page data is interfered with recording reference light, and an interference fringe produced as a result of the interference is recorded as a respective one of the plurality of element holograms on the hologram recording medium, the hologram recording medium comprising: a first element hologram of the plurality of element holograms on which subject data is recorded such that the subject data is a first image of first two-dimensional page data, object light of the first image of the first two-dimensional page data is interfered with recording reference light, and an interference fringe produced as a result of the interference is recorded on the first element hologram; and a second element hologram of the plurality of element holograms on which abridged subject data is recorded such that the abridged subject data is a second image of second two-dimensional page data, object light of the second image of the second two-dimensional page data is interfered with recording reference light, and an interference fringe produced as a result of the interference is recorded on the second element hologram, wherein the abridged subject data includes a representative sample of the subject data, the abridged subject data has a total data size that is smaller than a total data size of the subject data, and the bridged subject data is completely read out in a shorter time than the subject data.