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AssigneeOptware Corporation
InventorsHideyoshi Horimai, Mitsuteru Inoue, Toshitaka Fujii
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An object of the present invention is to make it possible to record information on an optical information recording medium in the form of three dimensional interference patterns so that the information is erasable in part. The optical information recording medium (1) has an information recording layer (3) made of a magneto-optic recording material. A pick-up (11) of an optical information recording/reproducing apparatus generates information light by spatially modulating laser light emitted from a light source unit (20) with a spatial light modulator (22), and generates recording-specific reference light spatially modulated in phase by spatially modulating the phase of the laser light emitted from the light source (20) with a phase-spatial light modulator (16). The information recording layer (3) of the optical information recording medium (1) is irradiated with the information light and the recording-specific reference light. An electromagnetic coil (30) applies a magnetic field to the information recording layer (3). A three-dimensional distribution pattern of magnetization corresponding to the interference pattern resulting from the information light and the recording-specific reference light is formed in the information recording layer (3).
An optical information recording apparatus for recording information on an optical information recording medium, the recording medium having an information recording layer made of a magneto-optic recording material, information being recorded in the information recording layer in the form of a three-dimensional distribution pattern of magnetization through the use of holography, the apparatus comprising:
An optical information reproducing apparatus for reproducing information front an optical information recording medium, the recording medium having an information recording layer made of a magneto-optic recording material, the information being recorded in the information recording layer in the form of a three-dimensional distribution pattern of magnetization through the use of holography, the apparatus comprising:
An optical information recording/reproducing apparatus for recording information on an optical information recording medium and reproducing the information from the optical information recording medium, the recording medium having an information recording layer made of a magneto-optic recording material, the information being recorded in the information recording layer in the form of a three-dimensional distribution pattern of magnetization through the use of holography, the apparatus comprising:
Dependencies are inferred from the claim text.