Objective lens mount and drive for optical disc player

Details Objective lens mount and drive for optical disc player Objective lens mount and drive for optical disc player

1984-02-17

1984-11-13

Cardillo, Jr., Raymond F.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 44, 250201, 350247, 350255, G11B 708, G11B 712

Patent

active

044829884

ABSTRACT:
In an optical disc player or other apparatus in which a light beam is directed through an objective lens to be focused thereby at a record medium surface for optically reading information recorded in a track on such surface; the objective lens has its central axis offset in respect to the longitudinal axis of a cylindrical body forming part of a movable assembly and through which the light beam passes axially, and such cylindrical body is both angularly displaceable about its longitudinal axis and axially displaceable relative to a guide bearing forming part of a fixed assembly to correct for tracking errors and for focusing errors, respectively. The fixed assembly further includes a magnetic circuit generating a magnetic field which intersects coils included in the movable assembly to receive focusing error and tracking error signals, respectively.

REFERENCES:
patent: 3992576 (1976-11-01), Sugiura
patent: 4003059 (1977-11-01), Sugiura et al.
patent: 4021101 (1977-05-01), Camerik
patent: 4092529 (1978-05-01), Aihara et al.
patent: 4135083 (1979-01-01), Van Alem et al.
patent: 4135206 (1979-01-01), Kleuters et al.
patent: 4193091 (1980-03-01), Kleuters
patent: 4252412 (1981-02-01), Camerik
patent: 4321701 (1982-03-01), Arquie et al.
patent: 4367543 (1983-01-01), Araki et al.
patent: 4386823 (1983-01-01), Musha
Okada et al., "A New PCM Audio Disk Pickup Employing a Last Diode", J. of Audio E. S., vol. 28, No. 6, 6/80.

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