Patent ID: 8164991

Claim:
An optical disk apparatus comprising: an optical pickup device which includes: a laser source, an objective lens which causes a laser beam emitted from the laser source to converge onto an optical disk, a temperature sensor which detects a temperature of the objective lens, an optical element which corrects deterioration of an optical characteristic of the laser beam passing through the objective lens, and a photodetector which receives the laser beam reflected by the optical disk; and a control circuit which drives the optical element based on a detection signal from the temperature sensor, wherein the control circuit has a functional portion for defining a correlation between a detection signal of the temperature sensor and a proper drive amount of the optical element, and the control circuit performs drive control of the optical element based on the correlation defined by the functional portion and the detection signal from the temperature sensor, wherein the functional portion retains a reference table in which the detection signal of the temperature sensor and proper drive amount of the optical element are correlated with each other, wherein the functional portion detects the proper drive amount of the optical element based on a detection signal of the photodetector in driving the optical element, the functional portion updates the reference table based on the proper drive amount and the detection signal of the temperature sensor, and the control circuit performs drive control of the optical element based on the updated reference table and the detection signal of the temperature sensor.