| 摘要 |
An optical information reproducing device and method of controlling the device capable of correcting a tracking remaining error component of a tracking error signal. The device includes a detector for detecting light of a laser beam reflected from a surface of an optical disk by a plurality of optical detectors and outputting a plurality of electric signals based on the detected reflected light, first delay circuits connected to the detector and capable of retarding one portion of the plurality of electric signals by a delay in a first predetermined range, and second delay circuits connected to the detector and capable of retarding another portion of the plurality of electric signals by a delay within a second predetermined range. Adding circuits are respectively connected to the first and the second delay circuits for forming a first and a second added signal by adding output signals from the first and the second delay circuits, and a phase detecting circuit is connected to the adding circuits for detecting a phase difference between the first and the second added signals. The tracking remaining error can be determined from the output of the phase detecting circuit and canceled or compensated to allow accurate tracking.
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