Optical disk apparatus

摘要

A linear velocity constant control (CAV control) for controlling a spindle motor so as to set a linear velocity in a track circumferential direction to be constant and an angular velocity constant control (CLV control) for controlling the spindle motor so as to set a rotation of a medium to be constant are switched and controlled for a change in position in the radial direction of the medium of a pickup in accordance with a detection result of the medium loaded. In the switching control, selection information of the CLV control and the CAV control is previously registered in accordance with the kind of medium and the CLV control or the CAV control is selected in accordance with the corresponding selection information obtained from the detection result of the medium.