Focusing optical head movable radially by a carriage

Details Focusing optical head movable radially by a carriage Focusing optical head movable radially by a carriage

1983-02-28

1985-11-19

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, 369 32, 350247, 350255, G11B 708, G11B 2110

Patent

active

045546533

ABSTRACT:
The invention provides an optical head for writing-reading a disk by means of at least a focussed radiation. This apparatus has at least one track, this track having evenly spaced apart grooves. An optical head using a motor having a fixed magnetic circuit with an air-gap in which a mobile assembly moves is provided. A magnetic circuit is additionally used which has a magnetic access and radial tracking circuit having at least one core intersecting all the grooves. The mobile assembly is formed of two actuators. The first of these actuators providing access to and radial tracking of the track. The second provides focussing of the light radiation on this track. There is a flexible fixing device connecting together these two actuators, along with a guide comprising friction sliding elements flexibly mounted on the radial and access actuator and allowing the actuator to slide over the core of the magnetic access and radial tracking circuit.

REFERENCES:
patent: 3969574 (1976-07-01), Janssen et al.
patent: 4092529 (1978-05-01), Aihara et al.
patent: 4185836 (1980-01-01), Taylor et al.
patent: 4236232 (1980-11-01), Jansen et al.
patent: 4239942 (1980-12-01), Van Alem et al.
patent: 4321701 (1982-03-01), Arguie et al.
patent: 4449213 (1984-05-01), Noborimoto et al.

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