| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a highly reliable distortion evaluator which enables the measurement of both of a local static distortion and a wide ranging dynamic distortion. SOLUTION: The distortion evaluator, which has an optical fiber 2 stuck on an object on use for evaluating the distortion of the object includes an FBG measuring device 1, a BOTDR 3 connected to the FBG measuring device 1 via the optical fiber 2 to be measured and filters 8 and 9 with a wavelength band which are provided respectively at connection parts between the FBG measuring device 1, the BOTDR 3 and the optical fiber 2 to be used by the FBG measuring device 1 and the BOTDR 3.</p> |
