Apparatus for driving objective lens

Details Apparatus for driving objective lens Apparatus for driving objective lens

1987-12-04

1989-06-13

Arnold, Bruce Y.

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Information location or remote operator actuated control

Selective addressing of storage medium

350255, 369 44, 369 45, G02B 704, G11B 708

Patent

active

048386499

ABSTRACT:
A slide shaft is provided upright on a support portion, and a lens support is provided on the slide shaft in such a manner that it can rotate around the slide shaft and slide in the axial direction of the slide shaft. Therefore, a hole having a larger diameter than that of the slide shaft is formed at the center of the lens support. An objective lens is provided at one end of the lens support. A drive portion comprises permanent magnets provided on the support portion and coils for rotation and sliding which are provided on the lens support, and the rotation and movement in the sliding direction are performed by passing currents through the coils. The lens support is supported by a support spring which has high rigidity to the translation in the tracking direction and low rigidity to the rotation in a plane intersecting the slide shaft at right angles.

REFERENCES:
patent: 4385373 (1983-05-01), Howe
patent: 4566089 (1986-01-01), Kime
patent: 4653856 (1987-03-01), Kamiko
patent: 4679903 (1987-07-01), Kasahara et al.

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