Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2007-01-25
2011-12-06
Edun, Muhammad N (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053190, C369S053200, C369S044320, C369S047280
Reexamination Certificate
active
08072858
ABSTRACT:
A disk motor which rotationally drives an optical disk; a rotational phase detector which detects a rotational phase thereof; an optical head having a collecting lens which collects an optical bean; a light detector and an LE signal generator which detect a position of the collecting lens in the optical head as a position signal; an LE signal memory recorder and an LE signal memory which store, in synchronization with a rotational phase to be detected by the rotational phase detector, the positional signal from the LE signal generator; an LE signal memory regenerator which outputs as a correction signal, in synchronization with a rotational phase to be detected, the positional signal which has already been detected; a subtractor; an LE signal filter, a drive circuit and a Tk actuator which move the collecting lens using a signal from the subtractor; and a low pass filter which reduces a high-frequency component of the correction signal are provided.
REFERENCES:
patent: 6300264 (2001-10-01), Ohara
patent: 6370094 (2002-04-01), Kishinami et al.
patent: 6498772 (2002-12-01), Fujiune et al.
patent: 7257052 (2007-08-01), Watanabe et al.
patent: 7782724 (2010-08-01), Kawabe
patent: 2-272030 (1990-11-01), None
patent: 2-292738 (1990-12-01), None
patent: 03-272030 (1991-12-01), None
patent: 5-135390 (1993-06-01), None
patent: 8-180426 (1996-07-01), None
patent: 9-274726 (1997-10-01), None
patent: 2000-86283 (2000-03-01), None
patent: 2001-160226 (2001-06-01), None
patent: 2005-182968 (2005-07-01), None
International Search Report for PCT/JP2007/051204, dated May 15, 2007.
Fujiune Kenji
Kikuchi Jun
Edun Muhammad N
Panasonic Corporation
RatnerPrestia
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