Optical head device

Details Optical head device Optical head device

1984-08-28

1986-10-07

McElheny, Jr., Donald

Dynamic information storage or retrieval

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

Mechanism control by the control signal

G11B 708

Patent

active

046163557

ABSTRACT:
A support mechanism supports a lens movable in focusing and tracking directions. Located on both sides of holder portions for holding the lens are structures each of which comprises two adjacent parallelograms whose one sides are common to each other. A connector portion comprising a stiff plate is arranged at each side of the structure (except that side of the structure which is directed to the holder portions). The point of intersection between the sides of the structure forms a hinge portion and two adjacent connector portions can be swung around the hinge portion. The structure deforms to move the lens in the focusing and tracking directions. A coil unit is arranged at the holder portion. This coil unit has focusing and tracking coils, which are subject to magnetic field applied from a magnet. When current is applied to the coils, the coil or coil unit receives force in the focusing and tracking directions. The movement of the lens can be controlled in the focusing and tracking directions by adjusting the magnitude and direction of the current applied.

REFERENCES:
patent: 4385373 (1983-05-01), Howe
patent: 4408313 (1983-10-01), Musha
patent: 4449213 (1984-05-01), Noborimoto et al.

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