Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1984-08-15
1987-06-16
Faber, Alan
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 33, 369 44, 369 45, 250201, 250202, G11B 7095
Patent
active
046740767
ABSTRACT:
An optical storage system employing a laser beam which is directed and focused onto an optical disk for reading and/or writing data in a track of the disk. Positioning control is achieved by providing for track following and track seeking using a plurality of interactive servo-loops. Proper focusing is maintained using focusing control circuitry which produces a focus error signal that is applied to a focus motor. This focusing control circuitry is able to return the objective lens assembly to its in-focus position so long as the objective lens assembly remains within a predetermined capture range. In the event that the objective lens assembly is outside of this capture range, a waveform generator is enabled which produces a correction signal that causes the focus motor to move the objective lens assembly back within the capture range with a velocity and for a time period sufficient to permit the focusing control circuitry to regain control and return the objective lens assembly to its in-focus position.
REFERENCES:
patent: 3932700 (1976-01-01), Snopko
patent: 4128847 (1978-12-01), Roullet
patent: 4138663 (1979-02-01), Lehureau
patent: 4216501 (1980-08-01), Bell
patent: 4222071 (1980-09-01), Bell
patent: 4232337 (1980-11-01), Winslow
patent: 4243848 (1981-01-01), Utsumi
patent: 4243850 (1981-01-01), Edwards
patent: 4253019 (1981-02-01), Opkey
patent: 4253734 (1981-03-01), Komurasaki
patent: 4268745 (1981-05-01), Okano
patent: 4368526 (1983-01-01), Harigae
patent: 4375091 (1983-02-01), Dakin
patent: 4417330 (1983-11-01), Hazel
"An Infra-Red Based Beam Scanner Position Sensor", by Fretheway, Published 9/15/81, IEEE Student Paper Competition.
"An Optical Disk Replaces 25 Mag Tapes", by Kenney, pp. 33-38, IEEE Spectrum; Feb. 1979.
"Optical Disk Systems Emerge", by Bartolini, pp. 20-28, IEEE Spectrum; Aug. 1978.
"Antireflection Structures for Optical Recording", by Bell, IEEE Journal of Quantum Electronics, vol. QE-14, No. 7.
"Ten Billion Bits on a Disk", by Bulthuis, pp. 26-33, IEEE Spectrum; Aug. 1979.
Hsieh Der C.
LaBudde Edward V.
Burroughs Corporation
Cass Nathan
Chung Edmund M.
Faber Alan
Peterson Kevin R.
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