| 摘要 |
An information reproducer in which not only the accuracy at the time of reading a signal but also the stability of a servo circuit are enhanced by adding a servo error signal to parameters for judging acceptability of a data signal in an optical disc. An information reproduction method, an information reproduction program and an information recording medium having such program recorded therein are also provided. A light receiving means is moved in the radial direction of the recording medium and, in the radial direction of the recording medium determined by such movement in the radial direction, the light receiving means is moved in the focus direction substantially orthogonally crossing the surface of the recording medium. An electric signal created from light received by the light receiving means moved in the focus direction is then operated and the electric signal value (offset value) in the radial direction is determined based on the symmetry of the electric signal in the operated moving direction of the light receiving means.
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