Optical pickup apparatus that emits two light beams having two different wavelengths

摘要

The optical pickup apparatus 100 uses a semiconductor laser element 50 integrated a first light emission source 36 for emitting a first laser beam with a second light emission source 40 for emitting a second laser beam, of which wavelength is different from that of the first laser beam. The optical pickup apparatus 100 is constructed so that a first half mirror functional surface 52b and a second half mirror functional surface 52c are provided in a beam splitter 52 to match an optical path in which the first laser beam passes through the first half mirror functional surface 52b of the beam splitter 52 and then is reflected at the second half mirror functional surface 52c and again is emitted from the first half mirror functional surface 52b to be directed toward a bifocal lens 54 with an optical path in which the second laser beam is reflected at the first half mirror functional surface 52b to be directed toward the bifocal lens 54.