Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1992-06-10
1993-12-21
LaRoche, Eugene R.
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
369 13, 3692754, G11B 1100
Patent
active
052726924
ABSTRACT:
A magnetooptic disk has circumferentially-spaced-apart, radially-aligned embossed sector areas which indicate data storage tracks. The sector areas include embossed signals which indicate track following information, and in a second area which trails the track-following information, track-seeking information is carried by the embossed signals. A magnetooptic coating covers the entire disk including the embossed sector areas. Readback clock synchronization signals are recorded over the track seeking area to enable synchronizing a readback phase locked loop such that more of the areas between adjacent sector areas can be used for recording data signals. During track seeking, the track seek controlling embossed signals are read using intensity demodulation, while in track following, during a readback, the clock signals recorded over the embossing are read for synchronizing the readback circuits. During recording, the synchronization signals are recorded over the embossed area dedicated to track seeking.
REFERENCES:
patent: 4151571 (1979-04-01), Cardot et al.
patent: 4297737 (1981-10-01), Andresen et al.
patent: 4402061 (1983-08-01), Hazel et al.
patent: 4424543 (1984-01-01), Lewis et al.
patent: 4486870 (1984-12-01), Pettigrew et al.
patent: 4535439 (1985-08-01), Satoh et al.
patent: 4594622 (1986-06-01), Wallis
patent: 4636855 (1987-01-01), Yamada
patent: 4669003 (1987-05-01), Bell et al.
patent: 4669004 (1987-05-01), Moon et al.
patent: 4730289 (1988-03-01), Saitoh et al.
patent: 4736352 (1988-04-01), Satoh et al.
patent: 4785167 (1988-11-01), Madrid
patent: 4814903 (1989-03-01), Kulakowski et al.
patent: 4823212 (1989-04-01), Knowles et al.
patent: 4905215 (1990-02-01), Hattori et al.
patent: 4964009 (1990-10-01), Moriya et al.
patent: 4984901 (1991-01-01), Maury
Henderson Ian E.
Tayefeh Morovat
International Business Machines - Corporation
LaRoche Eugene R.
Nguyen Tan
Somermeyer H. F.
LandOfFree
Data storage member having areas in which intensity-modulated si does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data storage member having areas in which intensity-modulated si, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data storage member having areas in which intensity-modulated si will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-313858