An application of optical fiber Fizeau interferometer to the detection of internal and surface defects in metal
| Autor: | Kyongjin Sok, Lyong Choe, Song Jon, Sung-Ryol So, Juhyok So, Kumchol Kim, NamChol He |
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| Rok vydání: | 2019 |
| Předmět: |
Fizeau interferometer
Materials science Optical fiber business.industry Ultrasound Physics::Optics General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Laser 01 natural sciences 0104 chemical sciences Creeping wave law.invention symbols.namesake Optics law symbols Physical and Theoretical Chemistry Rayleigh wave 0210 nano-technology business Sensitivity (electronics) Image resolution |
| Zdroj: | Chemical Physics Letters. 725:8-13 |
| ISSN: | 0009-2614 |
| Popis: | In this study, we detected the surface defect and internal defects up to 0.3 mm with accuracy of a relative discrepancy of 5% or less by using the arrival time difference of the reflected Rayleigh waves and the creeping wave. In the experiment, a Q-switched and pulsed Nd:YAG laser was used for the ultrasound generation while an optical fiber Fizeau interferometer was designed for detecting ultrasound generated by the laser line source. Our results showed that this system has a high sensitivity as well as a high spatial resolution comparing with other testing equipment. |
| Databáze: | OpenAIRE |
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