US Patent 7768895 Optical pickup device and optical disk drive

To reduce the size or thickness of an optical pickup device and an optical disk drive, an optical pickup device includes a light source that radiates laser light; a condensing member that condenses the laser light onto a recording medium; an optical member that reflects some of the laser light radiated from the light source into the condensing member and transmits the rest of the radiated laser light; and a light receiving sensor that receives the rest of the laser light transmitted through the optical member so as to detect an amount of laser light.