| 摘要 |
PURPOSE:To provide the optical head which is unified to miniaturize a device and simplifies the production and suppresses the loss of the quantity of incident light of a semiconductor laser and is capable of conducting 45 deg. polarization detection. CONSTITUTION:A supporting means 12 is fixed on a substrate 1, and a light emitting means 9 is arranged on this supporting means 12, and an optical path branching means 5 forms a prescribed angle with the substrate 1, and the side, which crosses the substrate 1, of the face of the supporting means 12 facing the optical path branching means 5 is inclined at a prescribed angle to the side crossing the substrate 1 of the optical path branching means 5, and the side, which faces the substrate 1, of the face of the supporting means facing the optical path branching means 5 is inclined at a prescribed angle to the face parallel with the substrate 1. The light emitted from a light emitting means 9 is reflected by the optical path branching means 5 and is reflected on a recording medium and is returned through the going way in the reverse direction and is transmitted through the optical path branching means 5, and p-polarized light is transmitted through by a polarizing means 3 and is received by a first photodetector 6, and s-polarized light is reflected and is received by a second photodetector 8. |
