Patent ID: 8238221
Filing Date: 2012-08-07
Classification: B82Y,G11B

Abstract:
1. An optical pickup device comprising: a first light source for emitting recording laser light; a second light source for emitting reproducing laser light having a wavelength different from a wavelength of the recording laser light; an objective lens for converging the recording laser light and the reproducing laser light; a quarter wavelength plate disposed between the first light source and the second light source, and the objective lens, both of the recording laser light and the reproducing laser light being incident into the quarter wavelength plate; a photodetector for receiving the reproducing laser light reflected on a recording medium; and a wavelength-selective polarized beam splitter, disposed between the quarter wavelength plate, and the first light source and the second light source, both of the recording laser light and the reproducing laser light being incident into the wavelength-selective polarized beam splitter, for guiding the reproducing laser light alone out of the recording laser light and the reproducing laser light reflected on the recording medium to the photodetector.