Patent ID: 7254098

Claim:
A CD-DVD compatible optical pickup, comprising: an optical output module having a mount and first and second light sources, positioned adjacent to each other on the mount emitting light beams having different wavelengths; an objective lens focusing light emitted from the first and second light sources onto two types of optical recording media; an optical path conversion unit positioned on an optical path between the optical output module and the objective lens, converting a traveling path of incident light; a photodetector receiving the light beams emitted from the first and second light sources, reflected from the optical recording media, and passed through the optical path conversion unit, detecting a data signal and an error signal; and an actuator having a movable member in which the objective lens is installed, moving the objective lens in a direction to compensate a focusing error signal and a tracking error signal, the actuator rolling the movable member, in a case where recording and/or reproduction of data is performed, using a light beam deviated from a main axis of the objective lens among the light beams emitted from the first and second light sources, wherein the actuator includes: a base on which the optical output module, the optical path conversion unit, and the photodetector are installed; a holder installed on the base; a plurality of elastic members, each having one end coupled to the holder and another end coupled to the moving member such that the movable member is supported movably, the length of the elastic member positioned nearer an inner circumference of the optical recording media with respect to the radius direction of the optical recording medium being different from that of the elastic member positioned nearer an outer circumference of the optical recording medium such that the movable member asymmetrically moves in a focusing direction of the optical recording media; and a magnetic driving unit driving the movable member in the focusing direction and a tracking direction of the optical recording media by an electromagnetic force.