Optically readable disc with a centering member fixed to a trans

Details Optically readable disc with a centering member fixed to a trans Optically readable disc with a centering member fixed to a trans

1983-05-02

1990-02-06

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369282, 369271, 369290, G11B 724, G11B 2314

Patent

active

048993298

ABSTRACT:
A transparent substrate has an information layer on an entirely flat side, and a centering member on the other side adapted to cooperate with a centering device of an apparatus for inscribing and/or reading the disc. The centering member may be glued in place and have an aperture for engagement by an apparatus spindle.

REFERENCES:
patent: 3430966 (1969-03-01), Gregg
patent: 4308545 (1981-12-01), Lehureau et al.
patent: 4365258 (1982-12-01), Geyer et al.
patent: 4379507 (1983-04-01), Llabres
patent: 4477894 (1984-10-01), Clurman
patent: 4510508 (1985-04-01), Janssen
Bounhuis et al, "Video Disk Player Optics", Applied Optics, vol. 17, No. 13, 7/78.
Bulthius et al, "Ten Billion Bits on a Disk", IEEE Spectrum, 8/79.
Bartolini et al, "Optical Disk Systems Emerae", IEEE Spectrum, 8/78.
Velzel, "Lazer Beam Reading of Video Records", Applied Optics, vol. 17, No. 13, 7/78.

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