Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2006-09-05
2006-09-05
Young, Wayne (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044320, C369S053190
Reexamination Certificate
active
07102966
ABSTRACT:
A lens actuator includes a lens holder to support an objective lens and having a pair of first side surfaces in a tracking direction and a pair of second side surfaces in a tangential direction, a fixed magnet disposed to confront the second side surface and comprising four regions having approximately the same area and are magnetic, such that magnetic directions of the four regions are perpendicular to a plane including a focusing direction and the tracking direction but are in opposite directions between two mutually adjacent regions, a pair of tracking coils disposed between the second surface and the magnet and having centers located on an outer side of corresponding centers of the four regions in the tracking direction, a focusing coil disposed between the second surface and the magnet and having a center located on an outer side of corresponding centers of the four regions in the focusing direction, and a radial tilt coil disposed between the second surface and the magnet and having a center located on an outer side of corresponding centers of the four regions in the focusing direction.
REFERENCES:
patent: 4696361 (1987-09-01), Clark et al.
patent: 4878460 (1989-11-01), Uchida et al.
patent: 4911135 (1990-03-01), Nishimura et al.
patent: 6339511 (2002-01-01), Tanaka
patent: 6904607 (2005-06-01), Wada
patent: 2001/0026404 (2001-10-01), Suh
patent: 2001/0038581 (2001-11-01), Kawano et al.
patent: 2002/0027841 (2002-03-01), Tanaka
patent: 2003/0015361 (2003-01-01), Bland
patent: 0 952 024 (1999-10-01), None
patent: 1 380 874 (1975-01-01), None
patent: 59 34929 (1984-02-01), None
patent: 2856176 (1998-11-01), None
patent: 2001-34974 (2001-02-01), None
Dickenstein Shapiro LLP
Pham Van T.
Ricoh & Company, Ltd.
Young Wayne
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