Optical pickup device, optical disk device, a computer, an optical disc player and the optical disc recorder

The first light source 1a is a first light flux having a first wavelength emitted, the second light source 1b includes a second light flux having a second wavelength different from the first wavelength, the first It emits a third light flux having a third wavelength different from of the wavelength and a second wavelength, a collimator lens 6, first objective lens 9 and the second objective lens 10 of the first to third light flux the condensed as convergent light on the optical disk, the first composite photodetector 13 detects the light beam reflected from the optical disk. First composite photodetector 13 includes a first quartered light-receiving portion 13a for receiving the light beam reflected from the optical disk of at least one light flux among the first to third light fluxes, from the optical disk of the remaining light flux and a second quarter-split light receiving portion 13b for receiving the reflected light beam. By this configuration, compatible with respect to at least three types of optical discs, it is possible to realize miniaturization.