Patent ID: 7557970

Claim:
A hologram recording method comprising: placing a signal light region that generates signal light, and a reference light region that generates reference light, symmetrically to one another about an optical axis of coherent light by displaying, on a spatial light modulator that spatially modulates the incident coherent light, a pattern that divides a modulating region into a plurality of regions; generating signal light and reference light by modulating the incident coherent light by the spatial light modulator; simultaneously and coaxially illuminating, onto a reflecting-type optical recording medium, the signal light and the reference light generated from the signal light region and the reference light region disposed symmetrically to one another; and recording the signal light on the optical recording medium as a hologram, wherein the modulating region of the spatial light modulator is divided into 4n+2 regions, where n is a natural number greater than or equal to 1.