Patent ID: 7623435

Claim:
An optical pickup apparatus which has a first light source and a second light source which simultaneously irradiate a first optical beam and a second optical beam on an information recording medium and receives reflected beams of the first optical beam and the second optical beam from the information recording medium, the optical pickup apparatus comprising: an objective lens for focusing the first optical beam and the second optical beam on the information recording medium; an irradiation position changing device having a sub-lens and displacing the sub-lens in focus directions, tracking directions, and jitter directions of the second optical beam to displace a focus irradiation position of the second optical beam for changing the focus irradiation position of the second optical beam on the information recording medium; a splitter device for splitting the reflected beams into a first reflected beam serving as the reflected beam of the first optical beam and a second reflected beam serving as the reflected beam of the second optical beam respectively; a light-receiving device for receiving the first reflected beam to output a first light-receiving signal and which receives the second reflected beam to output a second light-receiving signal; and a control device for controlling the irradiation position changing device on the basis of the second light-receiving signal to correct displacement of the focus irradiation position of the second optical beam with respect to the focus irradiation position of the first optical beam.