Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-03-06
2007-03-06
Wellington, Andrea (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044350, C369S053310
Reexamination Certificate
active
10250680
ABSTRACT:
A disc apparatus (10) includes an optical lens (14). A laser beam is irradiated onto a recording surface of the magneto-optical disc (68) through the optical lens (14), and a TE signal or an RF signal is detected on the basis of the laser beam reflected by the recording surface. Herein, an MPU (50) replaces the optical lens (14) in an optical axis direction, and a TE signal detection circuit (42) or an RF signal detection circuit (60) detects the TE signal or the RF signal at each of lens positions. A laser power is adjusted by the MPU (50) such that amplitude of each of the TE signal or the RF signal detected is below a saturation value. When a parameter is adjusted, a position of the optical lens (14) is controlled such that the amplitude of the TE signal or the RF signal detected thereafter is maximized.
REFERENCES:
patent: 5172352 (1992-12-01), Kobayashi
patent: 5187696 (1993-02-01), Ishii et al.
patent: 5379282 (1995-01-01), Wachi
patent: 5606536 (1997-02-01), Watanabe et al.
patent: 5862111 (1999-01-01), Arai
patent: 5946287 (1999-08-01), Nakayama et al.
patent: 6714493 (2004-03-01), Kishimoto et al.
patent: 1121624 (1996-05-01), None
patent: 1254158 (2000-05-01), None
patent: 58-158045 (1983-09-01), None
patent: 2-12617 (1990-01-01), None
patent: 4-23226 (1992-01-01), None
patent: 06-243488 (1994-09-01), None
patent: 2001-23165 (2001-01-01), None
Machine Translation of Fujimori (JP 2000-260046).
Aoi Yoshihiro
Asano Kenji
Minechika Shigekazu
Nagata Keiji
Okajima Tadashi
Agustin Peter Vincent
Sanyo Electric Co,. Ltd.
Wellington Andrea
Westerman, Hattori, Daniels & Adrain, LLP.
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