Apparatus and method for controlling the position of an optical

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

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369 4422, G11B 709

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active

056129351

ABSTRACT:
A recording/reproducing apparatus for a disc-shaped recording medium having a driving motor for running a disc-shaped recording medium in rotation, an optical pickup device and a chassis member carrying the optical pickup device for shifting the optical pickup device across the inner and outer peripheral portions of the signal recording region of the disc-shaped recording medium via a guide shaft and a guide member. The chassis member has a stop member abutted by the reference surface of the mounting base when the reference surface of the mounting base is abutted against the stop member for stopping the shifting of the optical pickup device. When the optical pickup deice has been moved to the inner most portion of the disc-shaped recording medium, the optical pickup device may be stopped highly accurately. In addition, the read-out start position for the disc-shaped recording medium may be detected highly accurately.

REFERENCES:
patent: 5343447 (1994-08-01), Okabe et al.
patent: 5381273 (1995-01-01), Goda
patent: 5392273 (1995-02-01), Masaki et al.
patent: 5493546 (1996-02-01), Kasahara

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