Tracking servo system for video disc player/recorder

Details Tracking servo system for video disc player/recorder Tracking servo system for video disc player/recorder

1977-09-22

1979-07-03

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003V, 360 77, H04N 576, G11B 1700, G11B 2110

Patent

active

041602706

ABSTRACT:
A servo loop is provided in an optical record/play apparatus for controlling a motor assembly providing relative motion in a radial direction, with respect to a disc record, between the disc record and a beam of focused light. In a record mode of operation for the apparatus, the loop drives the motor at a rate providing a constant speed radial relative motion, as the disc record is rotated, to enable the inscription of a spiral information track on the disc. In a playback mode of operation for the apparatus, the loop drives the motor at a variable rate providing relative radial motion which assures the centering of the beam of focused light on a spiral information track formed in the disc record medium as the disc is rotated.

REFERENCES:
patent: 3423524 (1969-01-01), Bradford
patent: 3530258 (1970-09-01), Gregg
patent: 3737877 (1973-06-01), Feinleib
patent: 3854015 (1974-12-01), Janssen
patent: 3908076 (1975-09-01), Broadbent
patent: 3931460 (1976-01-01), Watson
patent: 3944727 (1976-03-01), Elliott
patent: 3983317 (1976-09-01), Glorioso
patent: 4065786 (1977-12-01), Stewart

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