Optical disc method, media and apparatus for writing and/or read

Details Optical disc method, media and apparatus for writing and/or read Optical disc method, media and apparatus for writing and/or read

1980-06-18

1984-05-08

Cardillo, Jr., Raymond F.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

3461351, 360102, 369275, G11B 700, G11B 2504

Patent

active

044478992

ABSTRACT:
An improved method of optically writing and/or reading high density involves: (1) predeterminedly positioning a flat, uniformly thick, flexible, optical disc with respect to an axis of rotation; (2) rotating the disc on such axis at a high speed and in a predeterminedly spaced relation to a predeterminedly shaped, smooth, featureless reference surface and (3) coupling a central region between the disc and reference surface to an ambient gas source. Related apparatus and disc configurations, including embodiments having flexible disc covers, also are disclosed.

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Ahmed et al., "The Aerodynamic Stabilization of Video Discs", IEEE Transactions on Consumer Electronics, vol. CL-21, No. 2, 5/75, pp. 131-138.
Boyles, Self-Pressurized Enclosure for Flexible Magnetic Disks, IBM Tech. Disc. Bulletin, vol. 19, No. 8, 1/77, pp. 3177-3178.

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