Patent ID: 7263041

Claim:
A method for measuring a tilt control value of a pickup head in an optical disk drive, the pickup head having an object lens, the method comprising the steps of: moving the pickup head to a track to be measured; radiating a laser beam with a constant power; defining a set of tilt control values; controlling the tilt angle of the object lens of the pickup head according to the set of tilt control values, acquiring an RF signal corresponding to each tilt control value, and storing an associated value of a associated signal for each tilt control value according to the RF signal; detecting a maximum value among the stored associated values; selecting the tilt control value corresponding to the maximum value as the optimum tilt control value for the track and storing the optimum tilt control value if there is a maximum value; and modifying the set of tilt control values and executing the previous steps if there is no maximum value.