| 摘要 |
PURPOSE:To provide the optical axes of fixed optical system wholly on the same plane and to make the optical pickup device thin by supporting a deflecting member so as to be rotated around the axis parallel to the optical axis of a light flux to be made incident from a light flux emitting system for executing tracking operation. CONSTITUTION:The light flux to be emitted from a semiconductor laser 31 in a fixed optical system B is passed through a coupling lens 32, polarizing beam splitter 33 and quarter wave plate 34, which constitute the light flux emitting system, and afterwards, the light flux is made incident on a polarizing prism 35. After the light flux is polarized in this prism, the light flux is emitted to a moving optic system A. Namely, the optical axes of the light fluxes from the light flux emitting system of this fixed optical system B to the polarizing prism 35 are wholly arranged in the same line and the polarizing prism 35 is turned at a prescribed angle with the emitting optical axis of the semiconductor laser 31 as a center and the tracking operation is executed. Thus, the optical axes of the fixed optical system can be wholly set in the same line and the device can be made thin. |
