Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1987-12-11
1993-11-02
Young, W. R.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4432, 369 4434, 369 54, G11B 709
Patent
active
052589684
ABSTRACT:
A tracking error signal generating device using a four-segment detector in which signals from diagonally opposed elements are combined and the two so combined signals are phase compared. According to the invention, either before or during the combining, the output signals of the segments have high level components removed so as to reduce offsetting due to a non-uniform beam illuminating the detector.
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Ryder, J. D., "Electronic Fundamentals and Applications", 5th Edition, 1976, pp. 37-39, 459-462.
Matsuda Norio
Ohsawa Seiichi
Pioneer Electronic Corporation
Young W. R.
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