| 摘要 |
An optical disc apparatus for writing data on an optical disc 11 and/or reading data from the optical disc 11 by performing seek control for moving an optical pickup 15 to a target track on the optical disc 11 and focus servo of the optical pickup 15 according to a detected focus error signal and a first transfer function. This optical disc apparatus is provided with a memory 17a for holding a second transfer function different from the first transfer function, and executes the focus servo according to the first transfer function when the seek control is not performed or executes the focus servo according to the second transfer function when the seek control is performed. It is therefore possible to reduce the gain of a focus servo system without lowering the stability, for elimination of noise generated during the seek control.
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