Video disc with multiturn undulating storage track

Details Video disc with multiturn undulating storage track Video disc with multiturn undulating storage track

1974-02-04

1976-01-06

Moffitt, James W.

Telegraphy

Systems

Simplex-reversing periodic

178 66DD, 1791003V, 1791003G, G11B 724, H04N 100, H04N 302

Patent

active

039314600

ABSTRACT:
A video disc has a storage track formed of half wavelength pits alternating with lands. The track has a series of turns, individually of a generally circular path but undulating symmetrically about that path. The undulations of the several turns have such relative phase that the turns are in nested concentric relation and one component of the stored information represents the phase of the undulations.
The record is a replication of a master formed under the control of a laser writing beam modulated with the information to be stored. A Bragg cell in the optical path, responding to a cyclic frequency-modulated signal, optically displaces the writing beam about a reference path to develop undulations in the record storage track.

REFERENCES:
patent: 1917003 (1933-07-01), Williams
patent: 3673412 (1972-06-01), Olson
patent: 3798388 (1974-03-01), Dickopp
Eduology, Vol. 4, Issue 1, 1973, On Printing Motion by P. Kramer and K. Compaan.

Affiliated with

Also associated with

Rating

Video disc with multiturn undulating storage track does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Video disc with multiturn undulating storage track, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video disc with multiturn undulating storage track will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2350916