发明授权
US07557970B2 Hologram recording method, hologram recording device, hologram playback method, and optical recording medium 有权
全息记录方法,全息记录装置,全息图再现方法和光记录介质

Hologram recording method, hologram recording device, hologram playback method, and optical recording medium
摘要:
A hologram recording method, which records signal light onto an optical recording medium as a hologram, includes: placing a signal light region, which generates signal light, and a reference light region, which generates reference light, symmetrically with respect to an optical axis of coherent light by displaying, on a spatial light modulator which spatially modulates the incident coherent light, a pattern which 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.
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