| 摘要 |
The actuator (50) is used in a pickup device (100) for a drive device of an optical disc. The actuator is positioned opposing to the optical disc to irradiates a light beam from a light source to an information recording surface of the optical disc. The objective lens (4) is fixed at on the lens holder (5) forming the actuator (50) at a position closer to one end thereof. One coil substrate (7) is fixed on one side face of the lens holder in a range from the one end of the lens holder to a center portion of the lens holder, and the other coil substrate (7) is fixed on the other side face of the lens holder in a range from the other end of the lens holder to the center portion of the lens holder. Therefore, near the end of the lens holder on the objective lens side, the coil substrate is not attached to one side of the lens holder, providing a space below the objective lens. By arranging an optical system (3) to guide the light beam to the objective lens via the space, the optical system can be arranged at the same height level as the actuator. <IMAGE> |
