Video disc having a label for identifying material recorded ther

Details Video disc having a label for identifying material recorded ther Video disc having a label for identifying material recorded ther

1980-04-21

1982-05-11

Cardillo, Jr., Raymond F.

Registers

Records

369273, 369274, 369275, 369277, 369291, G06K 1906, G11B 724, G11B 2340

Patent

active

043295754

ABSTRACT:
A video disc record suitable for use with a video disc player apparatus is provided with a label for identifying the program material stored on the surface of the record. The label is formed in a machine readable format which comprises grooves in the surface of the record. In one format, whorls of a spiral groove on the surface of the record are spaced alternately with ungrooved areas on the surface. A readout apparatus comprises a light beam which is arranged to scan the grooved label and a detecetor which is arranged to sense the light beam reflected from the disc record surface. Light striking an ungrooved section is reflected in a substantially specular direction while light striking a grooved section is substantially scattered out of the specular direction. The detector is arranged to collect the light reflected into the specular direction.

REFERENCES:
patent: 1877079 (1932-09-01), Sturgis, Jr.
patent: 2038563 (1936-04-01), Herrmann
patent: 2952464 (1960-09-01), Stimley
patent: 3731060 (1973-05-01), Weinstein
patent: 3991883 (1976-11-01), Hobler et al.
patent: 4010355 (1977-03-01), Roehrman et al.
patent: 4011435 (1977-03-01), Phelps et al.
patent: 4023010 (1977-05-01), Horst et al.
patent: 4084185 (1978-04-01), de Lang et al.
patent: 4108365 (1978-08-01), Hughes
patent: 4109919 (1978-08-01), Elliott et al.
patent: 4143810 (1979-03-01), Greenaway
patent: 4180830 (1979-12-01), Roach
patent: 4204638 (1980-05-01), Laude

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