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公开(公告)号：FR2381374A1
公开(公告)日：1978-09-15
申请号：FR7800740
申请日：1978-01-05
Applicant: IBM
Inventor： HAARER DIETRICH , POLE ROBERT V , VOELKER SILVIA L
Abstract: NON-DESTRUCTIVE READOUT SCHEME FOR HOLOGRAPHIC STORAGE SYSTEM of the Invention A non-destructive readout scheme suitable for use with a holographic storage system having data stored in three spatial dimensions and one frequency dimension is described. The readout scheme and the holographic storage system use a preferred storage material which undergoes a reversible photochromic reaction involving two inhomogeneously broadened absorption bands. Information is written into the storage system by exposing the material to a holographic interference pattern of light at a frequency within either one of the two absorption bands. The non-destructive readout scheme involves reconstructing the original information by sensing the change in the index of refraction at a frequency just outside of and near either one of the two absorption bands. The readout scheme also includes sensing refractive index changes near one or more narrow absorption lines within either absorption band.
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公开(公告)号：DE2802594A1
公开(公告)日：1978-08-17
申请号：DE2802594
申请日：1978-01-21
Applicant: IBM
Inventor： HAARER DIETRICH , POLE ROBERT VLADIMIR , VOELKER SILVIA LEONOR
Abstract: NON-DESTRUCTIVE READOUT SCHEME FOR HOLOGRAPHIC STORAGE SYSTEM of the Invention A non-destructive readout scheme suitable for use with a holographic storage system having data stored in three spatial dimensions and one frequency dimension is described. The readout scheme and the holographic storage system use a preferred storage material which undergoes a reversible photochromic reaction involving two inhomogeneously broadened absorption bands. Information is written into the storage system by exposing the material to a holographic interference pattern of light at a frequency within either one of the two absorption bands. The non-destructive readout scheme involves reconstructing the original information by sensing the change in the index of refraction at a frequency just outside of and near either one of the two absorption bands. The readout scheme also includes sensing refractive index changes near one or more narrow absorption lines within either absorption band.
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公开(公告)号：CA1112365A
公开(公告)日：1981-11-10
申请号：CA291680
申请日：1977-11-24
Applicant: IBM
Inventor： CASTRO GEORGE , HAARER DIETRICH , MACFARLANE ROGER M , TROMMSDORFF HANS P
Abstract: FREQUENCY SELECTIVE OPTICAL DATA STORAGE SYSTEM of the Invention An optical data storage system and method that utilizes the frequency dimension to increase the storage capacity significantly. The system includes a storage material, for example, in the form of a block, adapted to undergo a photo induced reaction upon exposure to light and which exhibits inhomogeneous absorption line broadening. Data bits are stored by selective photo induced reactions induced by a narrow band laser at specific frequencies within the broad inhomogeneous line. The lifetime of these photo induced data bits is of the order of years so as to provide a nonvolatile storage system. In a preferred embodiment, a material is selected so that the photo induced reaction can be made reversible thereby permitting, when desired, the erasing of the data bits.
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Patent Agency Ranking
公开(公告)号：CA1108898A
公开(公告)日：1981-09-15
申请号：CA291025
申请日：1977-11-16
Applicant: IBM
Inventor： HAARER DIETRICH , POLE ROBERT V , VOELKER SILVIA L
Abstract: NON-DESTRUCTIVE READOUT SCHEME FOR HOLOGRAPHIC STORAGE SYSTEM of the Invention A non-destructive readout scheme suitable for use with a holographic storage system having data stored in three spatial dimensions and one frequency dimension is described. The readout scheme and the holographic storage system use a preferred storage material which undergoes a reversible photochromic reaction involving two inhomogeneously broadened absorption bands. Information is written into the storage system by exposing the material to a holographic interference pattern of light at a frequency within either one of the two absorption bands. The non-destructive readout scheme involves reconstructing the original information by sensing the change in the index of refraction at a frequency just outside of and near either one of the two absorption bands. The readout scheme also includes sensing refractive index changes near one or more narrow absorption lines within either absorption band.
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公开(公告)号：AU3118277A
公开(公告)日：1979-06-07
申请号：AU3118277
申请日：1977-12-02
Applicant: IBM
Inventor： CASTRO GEORGE , HAARER DIETRICH , MACFARLANE ROGER MORTON , TROMMSDORFF HANS PETER
Abstract: Enhanced optical data memory system, a frequency selective optical memory device, non-permanent memory system, reversible memory system, improved three-dimensional data memory system, providing a fourth dimension to a three-dimensional holographic memory and providing an improved method of data storage. (Machine-translation by Google Translate, not legally binding)
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公开(公告)号：DE2803121A1
公开(公告)日：1978-08-17
申请号：DE2803121
申请日：1978-01-25
Applicant: IBM
Inventor： CASTRO GEORGE , HAARER DIETRICH , MACFARLANE ROGER MORTON , TROMMSDORFF HANS PETER
Abstract: Enhanced optical data memory system, a frequency selective optical memory device, non-permanent memory system, reversible memory system, improved three-dimensional data memory system, providing a fourth dimension to a three-dimensional holographic memory and providing an improved method of data storage. (Machine-translation by Google Translate, not legally binding)
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公开(公告)号：CH625901A5
公开(公告)日：1981-10-15
申请号：CH77878
申请日：1978-01-25
Applicant: IBM
Inventor： CASTRO GEORGE , HAARER DIETRICH , MACFARLANE ROGER MORTON , TROMMSDORFF HANS PETER
Abstract: Enhanced optical data memory system, a frequency selective optical memory device, non-permanent memory system, reversible memory system, improved three-dimensional data memory system, providing a fourth dimension to a three-dimensional holographic memory and providing an improved method of data storage. (Machine-translation by Google Translate, not legally binding)
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公开(公告)号：FR2380619A1
公开(公告)日：1978-09-08
申请号：FR7800739
申请日：1978-01-05
Applicant: IBM
Inventor： CASTRO GEORGE , HAARER DIETRICH , MACFARLANE ROGER M , TROMMSDORFF HANS P
Abstract: Enhanced optical data memory system, a frequency selective optical memory device, non-permanent memory system, reversible memory system, improved three-dimensional data memory system, providing a fourth dimension to a three-dimensional holographic memory and providing an improved method of data storage. (Machine-translation by Google Translate, not legally binding)
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