Device for driving an objective lens

Details Device for driving an objective lens Device for driving an objective lens

1995-10-04

1996-07-30

Epps, Georgia Y.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4422, G11B 700

Patent

active

055418988

ABSTRACT:
An objective lens-driving used in the optical pickup of an optical disk drive. The device comprises an objective lens holder for holding an objective lens, a sheet coil, and a counterbalance mounted on the opposite side of the objective lens. The sheet coil comprises an insulating sheet on which focusing helical coil patterns and tracking helical coil patterns are juxtaposed. The holder has sheet-holding portions of an arc-shaped cross section. The focusing and tracking coil patterns are formed on the curved surfaces of the sheet-holding portions. Focusing magnets are mounted opposite to the focusing coil patterns. Tracking magnets are mounted opposite to the tracking coil patterns.

REFERENCES:
patent: 3436687 (1969-04-01), Andrews, Jr. et al.
patent: 4313151 (1982-01-01), Vranken
patent: 4759005 (1988-07-01), Kasahara
patent: 4998802 (1991-03-01), Kasuga et al.

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