Patent ID: 8750087
Filing Date: 2014-06-10
Classification: G11B

Abstract:
1. An optical pickup device, comprising: a light emitting system comprising a plurality of optical systems respectively corresponding to a plurality of media, the light emitting system comprising first and second light sources respectively corresponding to the plurality of media, wherein the second light source is configured to provide a Blu-ray Disc (BD) light; a light receiving system comprising a first photodetector configured to convert light reflected from the plurality of media into an electrical signal; a coupling lens disposed in a BD optical system of the plurality of optical systems, to reduce an optical distance in the BD optical system by adjusting an optical magnification; a light transmission system shared by the light emitting system and the light receiving system, the light transmission system configured to: a second beam splitter configured to receive light from each of the first and second light sources and directly convey portions of light received from each of the first and second light sources to a second photodetector and the first beam splitter, wherein the first beam splitter conveys the received portions of the first and second lights to the collimating lens.