| 摘要 |
<p>A multi-beam optical disk apparatus for recording/reproducing signals in/from an optical disk by the use of a plurality of optical beam spots, provided with a tracking error detection unit which directs a plurality of optical beams outgoing from the optical head onto the optical disk, directs one of the optical beams to the groove of the optical disk and obtains a tracking error signal by its reflected or transmitted beam.</p> |
