Patent ID: 7760592

Claim:
An optical disk apparatus for reproducing information from or recording information to an optical disk, comprising: an objective lens which forms a light spot onto a data recording film of said optical disk; an actuator which moves said objective lens in a radial direction of said optical disk, and a photodetector which detects reflection light from said optical disk; an error signal forming portion which forms a tracking error signal from a signal which is outputted from said photodetector; a controller which outputs a tracking drive signal on the basis of said tracking error signal; and an actuator driver which drives said actuator on the basis of an actuator control signal which is outputted from said controller, wherein an acceleration signal and a deceleration signal which are outputted from said controller to said actuator driver in order to move said objective lens in the radial direction, wherein the length of said acceleration signal output time and deceleration signal output time varies in accordance with a period from when said acceleration signal is outputted until said tracking error signal reaches a predetermined value after coming through a local maximum value or a local minimum value, wherein said deceleration signal output time varies in direct relation with said acceleration signal output time such that said deceleration signal output time becomes shorter as said acceleration signal output time becomes shorter and said deceleration signal output time becomes longer as said acceleration signal output time becomes longer.