Patent ID: 6944104

Claim:
A method of driving an optical pickup for executing at least tracking control and focus control by moving an objective lens by an actuator, characterized by: holding an aberration correction mechanism for correcting the wavefront of a laser beam incident on the objective lens integrally with the objective lens; creating a transmission signal by multiplexing a drive signal of the actuator with a drive signal of the aberration correction mechanism by a transmission unit and transmitting the transmission signal to a subject to be moved by the actuator by the transmission unit; and separating the drive signal of the actuator and the drive signal of the aberration correction mechanism from the transmission signal in a demodulation circuit on the side of the subject to be moved, and characterized in that transmission unit multiplexes the drive signal of the actuator and the drive signal of the aberration correction mechanism by commonly biasing a pair of lines for transmitting the drive signal of the actuator by a rectangular wave signal whose amplitude is limited by the drive signal of the aberration correction mechanism.