Patent ID: 8035873

Claim:
A hologram recording method comprising: generating light of a pattern comprising a signal light pattern and a reference light pattern concentric to each other, the reference light pattern being disposed at an outer side of the signal light pattern, the reference light pattern including a first pattern and a second pattern, the first pattern including an array of a plurality of first unit blocks and the second pattern including an array of a plurality of second unit blocks, the signal light pattern including a substantially single pattern including an array of a plurality of unit blocks, each of the plurality of unit blocks having a same luminance; collecting the generated light at an optical system, and illuminating it onto an optical recording medium; and recording, as a hologram, data which the signal beam expresses, wherein each of the first unit blocks includes a first number of pixels, each of the pixels within each first unit block having a same luminance, each of the second unit blocks includes a second number of pixels different than the first number of pixels, each of the pixels within each second unit block having a same luminance, and each of the pixels in the first unit blocks and the second unit blocks have substantially the same size.