| 摘要 |
PURPOSE: An optical disk apparatus and a control method for moving an objective lens are provided to correct the sensitivity fluctuation of an actuator of the optical pickup during layer jumping. CONSTITUTION: In an optical disk apparatus, a sensitivity adjusting circuit(19) measures time between reflection on a surface and reflection on a recoding layer of an optical disk(11) when moving an objective lens(13a). The time is considered to be in accordance with sensitivity of an actuator during layer jumping, and thereby the magnitude of a kick pulse and a brake pulse to be applied to the coil of the actuator is increased or decreased in accordance with the time between the reflection on the surface and the reflection on the recording layer. Thereby, the sensitivity dispersion of the actuator of the optical pickup is adjusted.
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