Actuator for optical pickup

Details Actuator for optical pickup Actuator for optical pickup

2011-01-18

2011-01-18

Nguyen, Hoa T (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

07872951

ABSTRACT:
An actuator capable of providing movement forces in a first direction, a second direction, and a third direction is provided. The actuator includes two sets of repelling permanent magnets and yokes, a focusing coil, a tracking coil, and a tilting coil. The repelling and attractive fields generated by the permanent magnets enable the coils to generate independent movements in three axial directions. The two sets of permanent magnets are placed in a repelling position, with a small space between the two magnets to generate a field whose magnetic forces repel and attract within the surrounding range. The focusing, tilting and tracking coils are engaged with the lens holder whose movements in the first, second and third directions are determined by the amplitude and direction of the electric current in the focusing, tilting and tracking coils respectively.

REFERENCES:
patent: 4385375 (1983-05-01), Okura et al.
patent: 2002/0071189 (2002-06-01), Ohno
patent: 2004/0130978 (2004-07-01), Hatazawa
patent: 2003141760 (2003-05-01), None

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