| 摘要 |
PURPOSE:To correctly and easily execute the impression and detection of a signal to an intended position by bringing the positional relation of an optical disk and an irradiating light source to a stationary condition at the time of a performance estimating test. CONSTITUTION:Since irradiating light beams P20 to an optical disk 100 is stopped-down irradiated to a point PD to the extent of 1mum, executes the recording, reproducing, erasing, etc., when a device is oscillated, it takes time to control a focus and in addition, it can be made harder to detect the desired signal. To prevent this, an estimating device is provided at a vibrating preventing base 700 of a range shown by a alternate long and short dash line excluding a keyboard 200, a controller 210 and an E/O 215, the linking of a signal with the element provided at the vibration preventing base 700 delivers the signal by using an optical data bus, etc., for a data bus 2, and the propagation of the vibration due to a cable connection, etc., is removed from a controller.
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