Apparatus for radial tracking in an optical disc drive using...

Details Apparatus for radial tracking in an optical disc drive using... Apparatus for radial tracking in an optical disc drive using...

2004-05-13

2009-11-10

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044130, C369S044270, C369S044350

Reexamination Certificate

active

07616536

ABSTRACT:
An optical disc drive uses a tracking error signal derived from the wobble-induced signal components of the optical detector signal. This tracking error signal is relatively insensitive to beamlanding errors, and to differences in the signal amplitudes of the output signal of individual detector segments. Further, the need for a 3-spot grating is eliminated. A distinction is made between a situation where the track being followed is empty, and a situation where the track being followed is written. In case the track being followed is empty, a tracking error signal is derived from the wobble-induced signal components of the optical detector signal, whereas, in case the track being followed is written, a tracking error signal is derived from the data-induced signal components of the optical detector signal.

REFERENCES:
patent: 4661944 (1987-04-01), Van Sluys
patent: 4847708 (1989-07-01), Furuyama
patent: 5303216 (1994-04-01), Shinoda et al.
patent: 5835459 (1998-11-01), Takahara et al.
patent: 5859830 (1999-01-01), Eastman et al.
patent: 6057548 (2000-05-01), Schatzberg
patent: 6222340 (2001-04-01), Kawabata et al.
patent: 6317394 (2001-11-01), Ohshita et al.
patent: 6388964 (2002-05-01), Watabe
patent: 6657930 (2003-12-01), Nomoto
patent: 6879549 (2005-04-01), Kim et al.
patent: 2001/0010667 (2001-08-01), Nakajo
patent: 2001/0040861 (2001-11-01), Aoki
patent: 2002/0039331 (2002-04-01), Park
patent: 2002/0080700 (2002-06-01), Watanabe et al.
patent: 2002/0138161 (2002-09-01), Kim
patent: 2001134960 (2001-05-01), None
patent: 98/49679 (1998-11-01), None
patent: 2004/105002 (2004-12-01), None

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