Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1990-11-16
1993-10-12
Young, W. R.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4429, 369 4432, 369 54, G11B 7095
Patent
active
052532399
ABSTRACT:
A tracking control apparatus is disclosed, in which a light beam is focused on an optical recording medium to form a light spot thereon, and a tracking error signal corresponding to a maximum or minimum point of total reflected light from a portion of the optical recording medium, which is irradiated by the light spot, is detected and used as a desired value for tracking servo control, whereby accurate tracking servo control can be made without producing any offset even when the surface of the optical recording medium is inclined or the optical axis of the light reflected from the optical recording medium deviates from a proper direction.
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patent: 5063549 (1991-11-01), Yamamuro
Edahiro Yasuaki
Moriya Mitsuro
Watanabe Katsuya
Matsushita Electric - Industrial Co., Ltd.
Tran Thang V.
Young W. R.
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