LUT
Laser Ultrasonic Testing
LUT – Laser Ultrasonic Testing is a remote, non-contacting ultrasonic technique that uses lasers to generate the ultrasonic waves in a sample and to also detect the reflected waves. A laser pulse is fired at the surface of the component and the rapid thermal shock produces sound waves in the component. A separate detection laser coupled with an interferometer is used to detect the reflected waves.
LUT simultaneously generates longitudinal, shear and surface waves in the component. Optical fibres can be used to apply LUT remotely. LUT is suited to the inspection of complex-shaped components and can be applied to a variety of materials, including metals and composites.
For more information on LUT, see:
Y Zhao et al, ‘Application of the hybrid laser ultrasonic method in rail inspection’, Insight: Non-Destructive Testing and Condition Monitoring, Vol 56, No 7, pp 360-366, July 2014.
and
https://laser-ut.tecnar.com/what-is-laser-ut
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