Patent ID: 8456971

Claim:
An optical disk driving apparatus comprising: an optical head device having a laser light source, a converging optical system including an objective lens converging a light beam emitted by the laser light source onto an optical disk, a photo detector receiving reflected light reflected by the optical disk, and an aberration correcting optical system controlling aberration of the converging optical system; a motor rotating the optical disk; an actuator moving the objective lens; a control section receiving a signal from the photo detector; and a temperature sensor located around a periphery of the laser light source to sense the temperature, wherein the converging optical system has an objective lens formed using resin as a main material, the aberration correcting optical system has a spherical aberration correcting element correcting spherical aberration of the objective lens, and the control section evaluates quality of a reproduction signal for information in the optical disk by using the reflected light received by the photo detector, and utilizes a result of the evaluation to perform control on the spherical aberration correcting element, and the control section performs control on the spherical aberration correcting element using a temperature difference determined based on the sensing result from the temperature sensor and an electrical current flowing through the actuator.