| 摘要 |
PURPOSE:To suppress to the utmost the fluctuation in the optical axis of the parallel beams of the parallel beams unit, and the fluctuation in the parallelism of the parallel beams and to suppress as best as possible the generation of the radiation noise and the radio wave noise using a semiconductor laser as a light source. CONSTITUTION:This optical pickup has the semiconductor laser 1, a high-frequency superposing means 8, a cell holder 3, a coupling lens 4 and an objective lens. The semiconductor laser 1 is provided with a flange part 1a, the outer periphery of which is exposed laterally and which is used to be pressed to the cell holder 3 at the time of position adjustment and is fixed to the cell holder 3 in pressurized contact therewith after the position adjustment. |
