Depth Detection of a Thin Aluminum Plate in Laser Ultrasonic Testing Using a Confocal Fabry-Perot Laser Interferometer

2011 ◽  
Vol 59 (5(1)) ◽  
pp. 3262-3266 ◽  
Author(s):  
Seung-Kyu Park ◽  
Sung-Hoon Baik ◽  
Hyun-Kyu Jung ◽  
Yong-Moo Cheong ◽  
Byung-Heon Cha ◽  
...  
Keyword(s):  
Ultrasonic Testing ◽  
Laser Interferometer ◽  
Aluminum Plate ◽  
Laser Ultrasonic ◽  
Thin Aluminum ◽  
Fabry Perot ◽  
Depth Detection

Laser ultrasonic testing system using a confocal Fabry-Perot interferometer with a fringe stabilization module

2005 ◽  
Author(s):  
Sung-Hoon Baik ◽  
Seung-Kyu Park ◽  
Min-Suk Kim ◽  
Chang-Hwan Lim ◽  
Byung Heon Cha
Keyword(s):  
Ultrasonic Testing ◽  
Testing System ◽  
Laser Ultrasonic ◽  
Fabry Perot

Fiber Bragg Grating-Based Fabry-Perot Interferometer Sensor for Damage Detection on Thin Aluminum Plate

2020 ◽  
Vol 20 (7) ◽  
pp. 3564-3571 ◽  
Author(s):  
N. Ismail ◽  
Z. M. Hafizi ◽  
Cheong-Weng Ooi ◽  
Muhammad Khairol Annuar Bin Zaini ◽  
C. K. E. Nizwan ◽  
...  
Keyword(s):  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Aluminum Plate ◽  
Bragg Grating ◽  
Thin Aluminum ◽  
Fabry Perot

scholarly journals Small-Sized Interferometer with Fabry–Perot Resonators for Gravitational Wave Detection

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1877
Author(s):  
Nikolai Petrov ◽  
Vladislav Pustovoit
Keyword(s):  
Correlation Function ◽  
Gravitational Waves ◽  
Laser Interferometer ◽  
Zero Order ◽  
Wave Detection ◽  
Resonant Modes ◽  
Fabry Perot ◽  
Spatially Distributed ◽  
Wave Laser ◽  
Higher Sensitivity

It is highly desirable to have a compact laser interferometer for detecting gravitational waves. Here, a small-sized tabletop laser interferometer with Fabry–Perot resonators consisting of two spatially distributed “mirrors” for detecting gravitational waves is proposed. It is shown that the spectral resolution of 10−23 cm−1 can be achieved at a distance between mirrors of only 1–3 m. The influence of light absorption in crystals on the limiting resolution of such resonators is also studied. A higher sensitivity of the interferometer to shorter-wave laser radiation is shown. A method for detecting gravitational waves is proposed based on the measurement of the correlation function of the radiation intensities of non-zero-order resonant modes from the two arms of the Mach–Zehnder interferometer.

scholarly journals Mid-IR laser ultrasonic testing for fiber reinforced plastics

2018 ◽  
Author(s):  
Masahiro Kusano ◽  
Hideki Hatano ◽  
Kanae Oguchi ◽  
Hisashi Yamawaki ◽  
Makoto Watanabe ◽  
...  
Keyword(s):  
Ultrasonic Testing ◽  
Fiber Reinforced ◽  
Laser Ultrasonic ◽  
Reinforced Plastics ◽  
Ir Laser ◽  
Fiber Reinforced Plastics

Non-contact laser ultrasonic testing of steel-plumbum bonding structure

2018 ◽  
Vol 47 (1) ◽  
pp. 117006
Author(s):  
夏嘉斌 Xia Jiabin ◽  
孙广开 Sun Guangkai ◽  
宋潮 Song Chao ◽  
周正干 Zhou Zhenggan
Keyword(s):  
Ultrasonic Testing ◽  
Laser Ultrasonic ◽  
Bonding Structure

scholarly journals Detection of Internal Holes in Additive Manufactured Ti-6Al-4V Part Using Laser Ultrasonic Testing

2020 ◽  
Vol 10 (1) ◽  
pp. 365 ◽  
Author(s):  
Jie Yu ◽  
Dongqi Zhang ◽  
Hui Li ◽  
Changhui Song ◽  
Xin Zhou ◽  
...  
Keyword(s):  
Ultrasonic Testing ◽  
Laser Doppler Vibrometer ◽  
Laser Ultrasonic ◽  
Ultrasound Waves ◽  
Hole Defect ◽  
X Ray Computed ◽  
Hole Defects ◽  
Pulse Echo ◽  
The Relationship ◽  
Non Destructive

For a non-contact, non-destructive quality evaluation, laser ultrasonic testing (LUT) has received increasing attention in complex manufacturing processes, such as additive manufacturing (AM). This work assessed the LUT method for the inspection of internal hole defects in additive manufactured Ti-6Al-4V part. A Q-switched pulsed laser was utilized to generate ultrasound waves on the top surface of a Ti-6Al-4V alloy part, and a laser Doppler vibrometer (LDV) was utilized to detect the ultrasound waves. Sub-millimeter (0.8 mm diameter) internal hole defect was successfully detected by using the established LUT system in pulse-echo mode. The method achieved a relatively high resolution, suggesting significant application prospects in the non-destructive evaluation of AM part. The relationship between the diameter of the hole defects and the amplitude of the laser-generated Rayleigh waves was studied. X-ray computed tomography (XCT) was conducted to validate the results obtained from the LUT system.

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