Optical recording/reproducing apparatus having means for periodi

Details Optical recording/reproducing apparatus having means for periodi Optical recording/reproducing apparatus having means for periodi

1991-06-18

1993-02-02

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4433, G11B 700

Patent

active

051843374

ABSTRACT:
The results output from a comparator, which makes a comparison to determine whether or not the drive current to be supplied to a focusing/tracking actuator of an optical system in which light beams are condensed and applied to an optical recording medium, are counted in each supervisory period at periodical intervals. If the counted value is larger than a predetermined value, supply of the drive current to the actuator is cut so as to prevent burning or the like of the actuator by the supplied excessively large electric current.

REFERENCES:
patent: 4982392 (1991-01-01), Soejima

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