Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1994-12-21
1997-03-11
Tran, Thang V.
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 32, 235454, G11B 700
Patent
active
056108842
ABSTRACT:
An optical information reproducing apparatus has an optical detector consisting of at least two light detecting elements receiving reflected light reflected from a beam spot portion extending over a plurality of tracks on an optical recording medium in which a plurality of tracks are provided parallel with each other. Two signals having different phases are produced in accordance with a direction in which the beam spot crosses a track based on the output of this optical detector, so that a track crossing direction is detected without being affected by dust or the like. Also, the number of crossing tracks is detected.
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Olympus Optical Co,. Ltd.
Tran Thang V.
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