Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1977-08-04
1979-01-16
Konick, Bernard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
1791003V, 250201, 250202, 310 27, H04N 576, G11B 712
Patent
active
041352068
ABSTRACT:
An optical scanning device which scans a rotary video disc with the aid of a light beam comprises an objective which performs focussing movements, for focussing a light spot on a recording surface of the video disc, as well as tilting tracking movements and time-error correction movements. Near its lower end the objective is suspended in an impregnated corrugated loudspeaker diaphragm of fabric fibre which enables the various movements of the objective to be made without giving rise to annoying resonant effects. The tracking movements and the time-error correction movements are obtained with the aid of coils which are connected to the objective near the upper end and which are disposed in air gaps of associated permanent magnetic stators.
REFERENCES:
patent: 2812825 (1957-11-01), Matthews
patent: 3924063 (1975-12-01), Simons
patent: 4011003 (1977-03-01), Dragt
patent: 4032776 (1977-06-01), Van Rosmalen
Bierhoff Martinus P. M.
Immink Kornelis A.
Kleuters Wilhelm J.
van Rosmalen Gerard E.
Cohen Simon L.
Faber Alan
Konick Bernard
Trifari Frank R.
U.S. Philips Corporation
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