| 摘要 |
An optical disk device includes an objective lens, a light detector, a lens holder, a focus drive actuator, a servo control section, and a control section. The focus drive actuator drives the lens holder along an optical axis of the objective lens. The servo control section and the control section control the focus drive actuator in such a manner that the objective lens is once separated from the optical disk and then brought close to the optical disk, and that when light reflected from the optical disk is detected by the light detector, the objective lens is brought close to the optical disk at a speed lower than a speed before the light is detected by the light detector. Further, the control section discriminates the kind of the optical disk.
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