Two dimensional actuator for moving optical medium of scanning d

Details Two dimensional actuator for moving optical medium of scanning d Two dimensional actuator for moving optical medium of scanning d

1982-01-19

1985-10-15

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

250201DF, 369 45, G11B 700

Patent

active

045478716

ABSTRACT:
An optical scanning device for subjecting a light spot to a focussing operation and for causing the light spot to perform a tracking operation to reproduce information stored in a video or audio disc is disclosed in which a coil controlling a focussing optical system for forming the light spot and another coil causing the light spot to track the above-mentioned information are both placed in a magnetic gap included in a magnetic circuit formed by a permanent magnet and a magnetic member, and the magnetic circuit is arranged in a direction perpendicular to the direction of the tracking operation.

REFERENCES:
patent: 4092529 (1978-05-01), Aihara et al.
patent: 4302830 (1981-11-01), Hamaoka
patent: 4321701 (1982-03-01), Arguie et al.

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