| 摘要 |
An optical disc player for reproducing an information signal from an optical disc on which the information signal is recorded in the form of pits arranged in a record track comprises an optical arrangement for directing a light beam to the optical disc to be modulated by the record track and reflected thereat, a photodetecting assembly for receiving a reflected light beam from the optical disc to produce in response to the received light beam an output from which a reproduced information signal can be obtained, and a control circuit portion including a tracking error signal producing circuit for generating a tracking error signal from the output of the photodetecting assembly when a beam spot formed by the light beam on the optical disc is positioned on the pit and a focus error signal producing circuit for generating a focus error signal from the output of the photodetecting assembly when the beam spot formed by the light beam on the optical disc is positioned on a plane portion of the optical disc between the pits. |
