| 摘要 |
An optical pickup device using a holography grating is provided to packages light sources which emit beams having different wavelengths so as to be one LD(Laser Diode) and input the respective beams emitted from the LD to one grating. A light source package(401) includes two or more light sources which generate different wavelengths. A beam splitter(403) splits the beam inputted from the light source package(401) into a main beam and two or more auxiliary beams. A collimating lens(404) adjusts the main beam and the two or more auxiliary beams split in the beam splitter(403) as collimating beams. A light condensing part(405) condenses the main beam and the two or more auxiliary beams adjusted in the collimating lens(404) at a specific position on an optical disc. A photo detecting part detects that the beam condensed by the light condensing part(405) is reflected from the optical disc. The beam splitter(403) includes a holography grating for mutually equalizing split angles of the auxiliary beams for the main beam when splitting the beams having two or more inter-different wavelengths inputted from the light source package(401) into the main beam and the two or more auxiliary beams. |
