Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2005-05-31
2005-05-31
Huber, Paul W. (Department: 2653)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044290, C369S044350
Reexamination Certificate
active
06901037
ABSTRACT:
A device for recording and/or reproducing an optical record carrier (1), comprises an optical system for projecting a first, a second and a third optical beam at a first (11), a second (12) and a third spot (13) at the record carrier (1). The device further comprises detection elements primary position signals (D5, C, D1) which is indicative for an amount of radiation reflected by the record carrier at said thoses spots (11). The device further comprises signal processing means (34.1, . . . 34.4; 35.1, . . . 35.4) for generating a plurality of secondary position signals (S1, S2, S3, S4) in response to the primary position signals (D5, C, D1). A selection element (36) selects one of the position signals (S1, S2, D1, S3, S4) as an output signal (WRE) in response to a selection signal (SEL). The selection signal (SEL) is derived from the output signal (WRE) of the selection element (36).
REFERENCES:
patent: 4660191 (1987-04-01), Maeda et al.
patent: 5121375 (1992-06-01), Kuribayashi
patent: 5341353 (1994-08-01), Yoshio et al.
patent: 6091685 (2000-07-01), Kim
patent: 6320831 (2001-11-01), Inoue et al.
patent: 6345020 (2002-02-01), Cho et al.
patent: 6366543 (2002-04-01), Uemura et al.
patent: 6504799 (2003-01-01), Yamashita et al.
patent: 6594210 (2003-07-01), Kumagai
patent: 6721242 (2004-04-01), Ohnishi et al.
Chin Wooi Liang
Krishnan Canniputhur Santhana Krishnan Sanjay
Yak Aik Seng
Belk Michael E.
Huber Paul W.
Koninklijke Philips Electronics , N.V.
Vuong Bach Q.
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