| 摘要 |
PROBLEM TO BE SOLVED: To achieve a vibration or elastic wave detector for improving a signal noise ratio of AE, ultrasonic response or response signals for vibration by having a simple structure. SOLUTION: The vibration or elastic wave detector for making wide band light including a reflective wavelength region of a receiving part FBG1 and a filter part FBG2 incident on the receiving part FBG1 and the filter part FBG2 and measuring vibration or elastic waves received with the receiving part FBG1 from intensity change of transmission light or reflection light of the receiving part FBG1 and the filter part FBG2 attaches the receiving part FBG1 and the filter part FBG2 to a specimen 7 so that reflection light distribution of the receiving part FBG1 and the filter part FBG2 is always intersected even when the receiving part FBG1 receives temperature change or strain. COPYRIGHT: (C)2010,JPO&INPIT
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