Optical disc apparatus, optical information equipment with...

Details Optical disc apparatus, optical information equipment with... Optical disc apparatus, optical information equipment with...

2011-07-05

2011-07-05

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044130

Reexamination Certificate

active

07974167

ABSTRACT:
In the present invention, at the time of pulling a focus on an information recording surface of a disc, a focus servo is first pulled in a disc surface of the disc, and with the servo in a settled state, a driving signal necessary for following surface wobble is stored, and a focus is pulled in the information recording surface of the disc based upon a signal superimposed with the driving signal and a focus search driving signal.

REFERENCES:
patent: 6529455 (2003-03-01), Okajima et al.
patent: 6552971 (2003-04-01), Iida
patent: 6721244 (2004-04-01), Kubota
patent: 7317667 (2008-01-01), Kanekami et al.
patent: 2002/0003755 (2002-01-01), Fujita et al.
patent: 2005/0162999 (2005-07-01), Yamashita
patent: 2007/0014206 (2007-01-01), Boku et al.
patent: 2002-230792 (2002-08-01), None
patent: 2003-91833 (2003-03-01), None

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