Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1984-06-22
1986-08-19
Psitos, Aristotelis M.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 58, G11B 708
Patent
active
046073574
ABSTRACT:
An optical pickup apparatus for reading information recorded on a recording medium, having an optical pickup device and a tilt servo control system for adjusting the angular position of the pickup device, the tilt servo control system comprising a deviation detection means including a light emitting means and a light receiving means, for detecting a deviation of the angle between an axis of the reading light from the optical pickup device and the surface of the recording medium from a right angle and generating a deviation detection signal, and a tilt drive mechanism connected to the optical pickup device, driven by a tilt drive signal generated from the deviation detection signal. The apparatus is characterized by a means for opening the servo loop of the tilt servo system when the light beam from the light emitting means has approached a portion of the recording medium in which no recording tracks are provided.
REFERENCES:
patent: 4374324 (1983-02-01), Van Rosmaker et al.
patent: 4502134 (1985-02-01), Kondo et al.
Pioneer Electronic Corporation
Psitos Aristotelis M.
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