Patent ID: 6556532
Filing Date: 2003-04-29
Classification: G02B,G11B

Abstract:
An optical pickup device comprising:a light source; a lens arranged on an optical path extending from said light source to a magneto-optical recording medium; an optical element arranged on an optical path extending from said light source to said lens, and separating polarized light of light reflected by said magneto-optical recording medium; and a photodetector detecting light separated by said optical element, said optical element including a first member formed of an isotropic optical medium, receiving light from said light source and reflecting the received light to direct the reflected light to said magneto-optical recording medium, a second member formed of an isotropic optical medium and arranged adjacent to said first member, further passing the light reflected by said magneto-optical recording medium and having passed through said first member, and a third member formed of an anisotropic optical medium and arranged adjacent to said second member, separating via a boundary surface of said second and third members the light having passed through said second member, and directing the separated light to said photodetector.