Magnetic information media storage with optical servo tracks

Details Magnetic information media storage with optical servo tracks Magnetic information media storage with optical servo tracks

1988-06-03

1990-10-02

Richardson, Robert L.

Dynamic magnetic information storage or retrieval

Record medium

360135, 360 7703, 369 4411, G11B 2110, G11B 5012

Patent

active

049611232

ABSTRACT:
A magnetic information storage medium, such as a floppy or rigid magnetic disk having a plurality of indelible grooves inscribed on a surface of the medium to function as optical servo tracks. The grooves can be in the form of a plurality of continuous or noncontinuous concentric circles. The grooves can also be a continuous spiral or a plurality of continuous concentric circles having non-constant widths and/or depths.

REFERENCES:
patent: 4633451 (1986-12-01), Ahn et al.
patent: 4805065 (1989-02-01), Jagannathan et al.
patent: 4816939 (1989-03-01), Ford et al.
patent: 4843494 (1989-06-01), Cronin et al.

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