| 摘要 |
PURPOSE:To reduce the deviational error of an optical axis, to make a device small in size and light in weight and to accelerate access and a data transfer speed by linearly moving an objective lens and a focus actuator and disposing an input/output optical head at a position where it crosses the moving direction of a linear actuator. CONSTITUTION:The objective lens 12 and the focus actuator are linearly moved by the linear actuator 5 and the input/output optical head 17 is disposed at the position where the optical axis thereof is crossed the moving direction of the linear actuator 5. Due to that, the distance of the access and the distance of the optical axis can be made the shortest and the deviational error of the optical axis can be reduced. Besides, the input/output optical head 17 and the focus actuator can be made a separated type structure. Thus, a movable part is made light in weight and the access and the data transfer speed is accelerated. |
