Objective lens actuator

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

Reexamination Certificate

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Details

C369S044140

Reexamination Certificate

active

07606119

ABSTRACT:
In one preferred embodiment, an objective lens actuator includes a base, a suspension apparatus mounted on the base, a holder suspended by the suspension apparatus for holding an objective lens, a voice coil motor (VCM) for driving the holder to vibrate, and a cover. The VCM includes a first yoke, a second yoke and a pair of magnets fixed on the first yoke and the second yoke respectively. The first yoke and the second yoke respectively include a first part and a second part. The cover is made of a material having a magnetic conductivity. The cover connects the first part and the second part of each of the first yoke and the second yoke.

REFERENCES:
patent: 4568142 (1986-02-01), Iguma
patent: 7408848 (2008-08-01), Ke et al.

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