Disc apparatus

Details Disc apparatus Disc apparatus

2011-06-28

2011-06-28

Klimowicz, William J (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

Reexamination Certificate

active

07969847

ABSTRACT:
A disc apparatus comprising: a jitter-value detection unit configured to detect a jitter value based on a signal to be read from a medium; a defocus-value setting unit configured to set a defocus value for focusing an objective lens in the medium based on the jitter value; and a defocus-value adjusting unit configured to detect the jitter value every time the defocus value is changed stepwise within a predetermined range of the defocus value including a reference value of the defocus value, to obtain an optimum defocus value to be set for the defocus-value setting unit within a predetermined time period, based on a maximum jitter value and a minimum jitter value of the detected jitter values.

REFERENCES:
patent: 5627807 (1997-05-01), Abe
patent: 7061835 (2006-06-01), Kobayashi
patent: 7460451 (2008-12-01), Baba
patent: 7791998 (2010-09-01), Uchino et al.
patent: 2002/0054549 (2002-05-01), Ohtsu
patent: 2004/0008594 (2004-01-01), Tokita et al.
patent: 2004/0017747 (2004-01-01), Ogawa
patent: 2004/0022151 (2004-02-01), Furumiya et al.
patent: 2004/0081051 (2004-04-01), Kimura et al.
patent: 07-262584 (1995-10-01), None
patent: 10-228652 (1998-08-01), None
patent: 2002-342948 (2002-11-01), None
patent: 2002-197698 (2002-12-01), None
patent: 2003-263760 (2003-09-01), None

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