
1) Nondestructive testing
Found on
https://www.crosswordclues.com/clue/shearography

Shearography or speckle pattern shearing interferometry is a measuring and testing method similar to holographic interferometry. It uses coherent light or coherent soundwaves to provide information about the quality of different materials in nondestructive testing, strain measurement, and vibration analysis. Shearography is extensively used in pro...
Found on
http://en.wikipedia.org/wiki/Shearography
No exact match found.