Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1989-11-17
1992-05-05
Envall, Jr., Roy N.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
356121, 359 25, 359 29, G11B 718, G11B 712
Patent
active
051114453
ABSTRACT:
An optical system for reading a plurality of radially contiguous individual holograms previously recorded on a rotatable disk along at least one of the disk tracks, each hologram being representative of a predetermined data pattern, and each being recorded as a Fourier transform hologram with respect tot the direction (y direction) tangential to the tracks and as a Fresnel hologram with respect to the radial direction (x direction), and wherein the optical system illuminates the disk with a read-out beam which is at least partially reflected by the disk to an array of photosensitive detectors which generates electrical data signals. A latch circuit is included for recovering the value of each data signal when the read-out beam completely illuminates one of the holograms.
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Demetri Psaltis, Alan A. Yamamura, Mark A. Neifeld, and Seiji Kobayashi, "Parallel Readout of Optical Disks"; Demetri Psaltis, Mark A. Neifeld, and Alan Yamamura, "Optical Disk Based Correlation Architectures," presented at the Third Topical Meeting on Optical* Newspaper Article released from the ASAHI Newspaper, Oct. 11, 1989, regarding a study by Seiji Kobayashi of Sony.
Demetri Psaltis, Mark A. Neifeld, Alan A. Yamamura, and Seiji Kobayashi, "Holographic Recording on Optical Disks," paper presented at International Symposium on Optical Memory, Kobe, Japan, Sep. 26-28, 1989.
Kobayashi Seiji
Psaltis Demetri
Yamamura Alan
Envall Jr. Roy N.
Sony Corporation
Tran Thang V.
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