| 摘要 |
A method for calibrating a tilt of an actuator includes the following steps: focusing a light beam projected from an objective lens onto a data layer of an optical disc; utilizing a digital signal processor to output control voltages through an analog driving circuit for driving the actuator to tilt the objective lens, and accordingly recording corresponding displacement signals of the objective lens; fitting a tilt curve through the recorded control voltages and the displacement signals; utilizing the digital signal processor to output a zero control voltage, not through the analog driving circuit, for tilting the objective lens, and accordingly measuring a standard displacement signal; acquiring a bias voltage from the tilt curve according to the standard displacement signal; and calibrating the tilt of the actuator by offsetting a control voltage outputted from the digital signal processor according to the bias voltage for controlling the analog driving circuit. |
