| 摘要 |
PURPOSE:To attain long term stability of a semiconductor laser by making an optical pickup main body mounted with a semiconductor laser with a plastic and forming a heat dissipation open hole at least near the part mounting the semiconductor laser. CONSTITUTION:The heat dissipation open hole 1a is formed to the optical pickup main body 1 near the mounting part of the semiconductor laser 2 to the optical pickup main body 1 made of a plastic, the heat dissipation open hole 11a is formed to a cover 11 so as to avoid the heat from the semiconductor laser itself from being kept in the optical pickup. Further, the heat dissipation open hole 10a is formed near a drive coil constituting an actuator 8 so as to avoid the heat from being kept in the pickup. Since the heat dissipating performance of the optical pickup main body 1 made of a plastic is improved sufficiently in this way, the semiconductor laser 2 is used stably for a long time. |
