Information recording/reproducing apparatus for optical informat

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

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369 4425, 369 4429, 369 54, G11B 7085

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054775132

ABSTRACT:
Information is recorded and reproduced by making a light beam traverse guide tracks to reach a target track. In moving the light beam to the target track, a current output circuit responds to a track jump command, and supplies a drive current to an objective lens driver. The driver current is transformed by the conversion circuit into a rapidly rising and gradually falling current, and supplied to the driver, The objective lens then moves. When the light beam reaches a track adjacent the target track, a track traverse detecting circuit supplies a track traverse detecting signal. In response to this signal, the current output circuit supplies a damping current by reversing the polarity of the drive current to the driver. The damping current is transformed by the conversion circuit into a rapidly rising and gradually falling current, and supplied to the driver.

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