| 摘要 |
PURPOSE:To measure easily and accurately the dynamic characteristic the phase characteristic etc. of an actuator, by using selectively a measuring device at a measuring part, then measuring the dynamic characteristic of an objective lens corresponding to said measuring device. CONSTITUTION:At a measuring part 20, a measuring device 24 which is used to measure the dynamic characteristics of an objective lens 40 is fitted by a screw in a free loading/unloading way to each fitting hole 23 formed to the attachment surface of a support member 22 of a measuring device which is attached rotatably to a rack 21 of a position controller 30. It is possible to select the device 24 and at the same time set opposite to the lens 40 by turning the member 22. At the same time, the device 24 can be loaded and unloaded to the member 22. Various types of other necessary devices 24 are provided and then replaced when necessary for measurement. In such a way, it is possible to measure the characteristics of the lens 40 and other pickup mechanisms corresponding to the lens 40. |
