Optical read/write head for recording and playback of an optical

Details Optical read/write head for recording and playback of an optical Optical read/write head for recording and playback of an optical

1983-02-22

1986-02-11

Faber, Alan

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 44, 369111, 369249, 369219, G11B 712

Patent

active

045702497

ABSTRACT:
An optical head is provided for writing and reading a disk by means of at least one focused beam, the disk being provided with at least one track having uniformly spaced grooves. The optical head makes use of a motor comprising a fixed magnetic circuit provided with at least one air-gap in which a moving system is capable of displacement and is also provided with an access and radial tracking magnetic circuit including at least one core which is secant with all the grooves. The moving system is constituted by two actuators, the first actuator being intended to permit access and radial tracking while the second actuator permits focusing of the light beam on the track, the two actuators being coupled by flexible attachment means. Guiding means comprising magnetic elements permit lifting of the access and radial tracking actuator with respect to the core of its magnetic circuit.

REFERENCES:
patent: 3969574 (1976-07-01), Jonssen
patent: 4193091 (1980-03-01), Klevters
patent: 4236232 (1980-11-01), Jonsen
patent: 4239942 (1980-12-01), Van Alem
patent: 4321701 (1982-03-01), Arquie
patent: 4367543 (1983-01-01), Araki
patent: 4394755 (1983-07-01), Gijzen
patent: 4403316 (1983-09-01), Veerdonk
patent: 4414657 (1983-11-01), Arquie
patent: 4449213 (1984-05-01), Noborimoto
patent: 4462096 (1984-07-01), Kusaka

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