Patent ID: 7843791

Claim:
An optical information processing method comprising steps of: forming a plurality of first recording regions by allowing a first signal beams and a first reference beam having multiple incidence angles in a first incidence angle range for one position to be incident to a plurality of positions of a storage medium, wherein border parts of incidence regions of the first reference beam corresponding to multiple incidence angles are formed in a hierarchical pattern, wherein the first recording regions are formed to be separated from each other; forming each of a plurality of second recording regions between the first recording regions by allowing a second signal beams and a second reference beam having multiple incidence angles in a second incidence angle range for one position to be incident to a plurality of positions, so that the first recording regions and the second recording regions do not overlap with each other, wherein the second recording regions are formed to be separated from each other and partially overlap with the border parts of the first reference beam; and forming each of a plurality of partial an overlap recording regions by allowing a third signal beam and a third reference beam having multiple incidence angles in a third incidence angle range different from the first and second incidence angle range to be incident to a position so that first portion of the partial overlap recording region partially overlaps with the first recording region and second portion of the partial overlap recording region partially overlaps with the second recording region.