Patent ID: 6646976
Filing Date: 2003-11-11
Classification: G11B

Abstract:
An optical pickup apparatus which reduces cross talk in an information signal caused by adjacent tracks of a recording medium, the optical pickup apparatus comprising:a light source which emits a light beam; an objective lens, disposed on an optical path between the light source and the recording medium, which converges the emitted light beam onto the recording medium; a light path changer, disposed on an optical path between the light source and the objective lens, which changes a light path of the emitted light beam and changes a light path of a light beam reflected from the recording medium; a detector which divides the reflected light beam into a center portion and at least one side portion corresponding to a radial direction of the recording medium and generates a first signal corresponding to the center portion and at least one other signal, each other signal corresponding respectively to one said side portion; and an operation unit which receives the first signal and at least one other signal, performs an operation on the at least one other signal, and combines the operated signal with the first signal to provide the information signal of a desired track having reduced cross talk caused by tracks adjacent to said desired track, said operation unit comprising: a multiplier which multiplies the at least one other signal by an adjusting operation constant K; and an adder which adds the multiplied signal and the first signal to output a reduced cross talk information signal.