| 摘要 |
An optical disc recording and/or reproducing apparatus 1 is provided in which servo having high followup performance can be applied without impairing steady-state stability under suppression of servo errors. The optical disc recording and/or reproducing apparatus 1 includes a shock sensor 7 for detecting an impact applied from outside, and a servo unit 14 which performs servo on the basis of focussing error signals and tracking error signals and in which the servo operation is switched between a first state having a usual servo followup performance and a second state having a servo followup performance higher than said first state. The apparatus 1 also includes a controller 15 having the finction of discriminating the impact strength sensed by the shock sensor 7 and of switching the servo operation of the servo unit 14 to the second state when the impact strength exceeds a pre-set strength.
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