Information recording and/or reproducing apparatus provided...

Details Information recording and/or reproducing apparatus provided... Information recording and/or reproducing apparatus provided...

G - Physics

11

B

352/32.1

G11B 7/09 (2006.01) G11B 19/04 (2006.01)

Patent

CA 1311557

ABSTRACT OF THE DISCLOSURE An apparatus for applying a light beam to an optical recording medium having tracks provided thereon and effecting at least one of recording and reproduction of information comprises a light source emitting the light beam, an optical system for directing the light beam emitted from the light source to the medium, means for receiving the light flux reflected by or transmitted through the medium and detecting a tracking error signal indicative of the deviation between the applied position of the light beam and a track, tracking servo means for moving at least a portion of the optical system on the basis of the tracking error signal and correcting the applied position of the light beam, and means for detecting any abnormality of tracking servo from the velocity of the moved portion of the optical system.

575302

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