Optical mass data memory

Details Optical mass data memory Optical mass data memory

1975-04-02

1976-06-08

Fears, Terrell W.

Communications: electrical

Digital comparator systems

350161, 340173LT, G11C 1304, G11C 1142

Patent

active

039626881

ABSTRACT:
An optical memory for storing large amounts of information with a great packing density having writing and reading cycles controlled by a computer. A laser beam provides writing and reading of information on and from, respectively, a rotating memory disk in response to acousto-optical modulation of the beam. This modulation provides fine adjustment of the beam in the radial direction of the disk while coarse adjustment of the beam takes place mechanically. An acousto-optical modulator is arranged in the path of the laser beam, for both amplitude and frequency modulating the beam, so that it is fine adjusted for deflection, or for providing different intensities, while a mechanical coarse adjusting unit stepwise displaces the beam in the radial direction of the disk.

REFERENCES:
patent: 3696344 (1972-10-01), Feinleib
patent: 3720924 (1973-03-01), Aagard
patent: 3744039 (1973-07-01), Hrbek
patent: 3774172 (1973-11-01), Silverman
patent: 3898629 (1975-08-01), Westerberg

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