Optical scanning device

Details Optical scanning device Optical scanning device

G - Physics

11

B

352/32.2

G11B 7/00 (2006.01) G11B 7/09 (2006.01) G11B 7/12 (2006.01)

Patent

CA 1124392

PHN.8739 08-07-77 ABSTRACT: An optical scanning device which scans a rotary video disc with the aid of a light beam comrises 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 move- ments 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 as- sociated permanent magnetic stators. - 19 -

299406

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