CONTROL DEVICE AND OPTICAL DISC DEVICE HAVING THE CONTROL DEVICE

摘要

There is provided a device capable of evading collision between an objective lens and members in the disc device, and performing a high-speed operation upon disc mounting and eject, and a high-speed transfer to the focus control state. An information processing device includes: a convergence unit for converging light; a movement unit for moving the light focal point by changing the position of the convergence unit according to a drive signal, into a vertical direction to the information surface of a recording medium; a position control unit for generating a position control signal for changing the position of the convergence unit at the speed based on its position; a focus control unit for generating a focus control signal for positioning the light focal point in the range where focus control is enabled according to the light quantity signal of the reflected light; a selector unit for selectively outputting the position control signal or the focus control signal; and a drive unit for outputting the drive signal according to the signal outputted from the selector unit. The selector unit outputs the position control signal, moves the light focal point to the position where focus control is enabled, and then outputs the focus control signal.