Variable pitch grooved label for video disc

Details Variable pitch grooved label for video disc Variable pitch grooved label for video disc

1980-04-21

1982-07-27

Cardillo, Jr., Raymond F.

Registers

Records

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

Patent

active

043419526

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 of a first pitch are spaced alternately with whorls of a spiral groove of a second pitch. A readout apparatus comprises a light beam which is arranged to scan the grooved label and a detector which is arranged to sense the light beam reflected from the disc record surface. Light striking a grooved section of first pitch is reflected in a substantially specular direction while light striking a grooved section of second pitch is substantially scattered out of the specular direction. The detector is arranged to collect the light reflected into the specular direction.

REFERENCES:
patent: Re22183 (1942-09-01), Thompson
patent: 1877079 (1932-09-01), Sturgis
patent: 2038563 (1936-04-01), Herrmann
patent: 2952464 (1960-09-01), Stimler
patent: 3708655 (1973-01-01), Schanne
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: 4066268 (1978-01-01), Borchard
patent: 4108365 (1978-08-01), Hughes
patent: 4109919 (1978-08-01), Elliott et al.
patent: 4166621 (1979-09-01), Isaacson et al.
patent: 4180830 (1979-12-01), Roach

Affiliated with

Also associated with

Rating

Variable pitch grooved label for video disc does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable pitch grooved label for video disc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable pitch grooved label for video disc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2026517