Patent ID: 8320227

Claim:
An optical pickup, comprising: a first light source; a second light source; a first objective lens; a second objective lens; a lens holder for supporting the first objective lens and the second objective lens; an actuator for driving the lens holder; a first light detector; and a second light detector, wherein: the first light source emits light having a first wavelength, the second light source emits light having a second wavelength which is shorter than the first wavelength, the light having a first wavelength emitted by the first light source is collected on a data recording face of a first optical disc by the first objective lens, and light reflected by the data recording face of the first optical disc is converted into an electric signal by the first light detector, the light having the second wavelength emitted by the second light source is collected on a data recording face of a second optical disc by the second objective lens, and light reflected by the data recording face of the second optical disc is converted into an electric signal by the second light detector, focusing error signals are respectively generated based on the electric signals by the first light detector and the electric signal by the second light detector, a focusing detection range of the focusing error signal generated based on the electric signal by the first light detector is larger than a focusing detection range of the focusing error signal generated based on the electric signal by the second light detector, and an interval between an optical axis of the first objective lens and an optical axis of the second objective lens is 5 mm or less.