High-speed focus pull-in controllers for adaptively...

Details High-speed focus pull-in controllers for adaptively... High-speed focus pull-in controllers for adaptively...

2008-01-01

2008-01-01

Korzuch, William R. (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044250, C369S044350

Reexamination Certificate

active

07315495

ABSTRACT:
Upper and lower limit values of disk surface vibration are detected and stored per a predetermined time while a signal is reproduced from an optical disk device and, if focus on the disk deviates from a focus allowable range initially set, a focus repull-in operation is performed with reference to the upper and lower limit surface vibration values stored previously.

REFERENCES:
patent: 6154425 (2000-11-01), Iida et al.
patent: 10031828 (1998-02-01), None
patent: 2000155953 (2000-06-01), None
patent: 2003036546 (A) (2003-02-01), None
patent: 100290735 (2001-03-01), None
patent: 010058416 (2001-07-01), None

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