Patent ID: 8385179

Claim:
An optical disk device capable of loading a plurality of different kinds of optical disks for use with different laser wavelengths, comprising: a first laser source configured to emit laser light of a first wavelength, the first laser source suitable for operation with BLU-RAY discs; a second laser source configured to emit laser light of a second wavelength longer than the first wavelength; a first objective lens arranged to receive laser light of the first wavelength from the first laser source; a second objective lens arranged to receive laser light of a second wavelength from the second laser source, a numerical aperture of the second objective lens being smaller than a numerical aperture of the first objective lens; an actuator to drive the first objective lens and the second objective lens; a spherical aberration corrector to correct spherical aberration of laser light of the first wavelength; and a determining module configured to determine the kind of optical disk is loaded in the optical disk device, by using a laser light reflected from the optical disk loaded in the optical disk device, wherein a first determining process is performed in a manner that the spherical aberration corrector is set to a correction status suited to the BLU-RAY discs, the first laser source emits a laser light of the first wavelength suitable for operation with the BLU-RAY discs, the actuator drives the first objective lens, and the determining module determines the kind of optical disk loaded in the optical disk device, and wherein a second determining process is performed in a manner that, in accordance with the determination result of the first determining process, the second laser source emits laser light of the second wavelength, the actuator drives the second objective lens, and the determining module determines the kind of optical disk is loaded in the optical disk device.