Information recording method, reproducing method, and recording reproducing method utilizing holography
AssigneeOptware Corporation
InventorHideyoshi Horimai
Life of this patent
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Abstract
A method for recording information on a recording medium utilizing an interference pattern by interference between an information light modulated spatially with digital pattern information displayed on a spatial light modulator having multiple pixels and a reference light for recording. In order to provide a novel recording method capable of enhancing the recording density and the transfer rate furthermore, digital information to be recorded is represented by match/mismatch of the attributes of adjacent pixels in the spatial light modulator to produce digital pattern information.
Claims16
An information recording method wherein information is recorded to a recording medium by utilizing an interference pattern formed by the interference between an information light, which is spatially modulated by digital pattern information displayed in a spatial light modulator which has a large number of pixels, and reference light for recording, and a reference light for recording, wherein:
- digital information that is recorded is digital pattern information and expressed by the matching or mismatching of the attributes of adjacent pixels in said spatial light modulator.
An information reproducing method that the information is reproduced from a recording medium wherein information is recorded by utilizing an interference pattern formed by the interference between an information light, which is spatially modulated by digital pattern information displayed in a spatial light modulator which has a large number of pixels, and reference light for recording, and a reference light for recording, wherein:
- a reference light for reproduction is radiated to the recording medium to generate a reproduction light by which said digital pattern is carried;
- and
- the matching and mismatching of the attributes of adjacent pixels in the digital pattern information of the reproduction light are detected.
An information recording/reproducing method wherein information is recorded to a recording medium by utilizing interference pattern formed by interference between information light, which is spatially modulated by digital pattern information displayed in a spatial light modulator which has a large number of pixels, and reference light for recording, and information is reproduced from a recording medium to which information is recorded, wherein:
- digital information that is recorded is digital pattern information and expressed by the matching or the mismatching of the attributes between adjacent pixels in the spatial light modulator;
- the reproduction light which carries digital pattern information is generated by irradiating the recording medium with reference light for reproduction;
- and
- the matching and mismatching of attributes of adjacent pixels in the digital pattern information of the reproduction light are detected.
An information recording method wherein information is recorded in a recording medium by utilizing an interference pattern formed by interference between information light, which is spatially modulated by digital pattern information displayed in a spatial light modulator which has a large number of pixels arranged in a grid, and reference light for recording, wherein:
- digital information that is recorded is digital pattern information and expressed by the allocation of pixel groups comprising a succession of a plurality of pixels whose attributes are match each other within a predetermined area of the spatial light modulator.
Dependencies are inferred from the claim text.