Information recording method, reproducing method, and recording reproducing method utilizing holography
First Claim
1. 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.
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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.
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Citations
16 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5)
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6. 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:
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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. - View Dependent Claims (7, 8)
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9. 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:
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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. - View Dependent Claims (10, 11, 12, 13, 14)
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15. 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. - View Dependent Claims (16)
Specification