Actuator using focusing-substrate

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

Reexamination Certificate

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Details

C369S044220

Reexamination Certificate

active

07324412

ABSTRACT:
An actuator includes a focusing-substrate having a focusing coil pattern for generating focusing driving force, the focusing-substrate being provided with a land part and a hole through which laser beams pass, tracking coils for generating tracking driving force, the tracking coils being wound around opposite sides of the focusing substrate in parallel with the a wire direction, magnets for providing magnetic force to the focusing coil pattern and the tracking coils, and a yoke plate provided with a pair of first yokes for fixing the magnets.

REFERENCES:
patent: 2005/0060732 (2005-03-01), Kang et al.
patent: 63129535 (1988-06-01), None
patent: 06176386 (1994-06-01), None
patent: 11306563 (1999-11-01), None
patent: 1020030006588 (2003-01-01), None

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