Shearography - Non Destructive Testing (NDT)

Shearography is an optical, Non-Destructive Testing (NDT) technique that provides fast and accurate information about internal material discontinuities or anomalies in non-homogenous materials. Using laser light, a shearing interferometer is able to detect extremely small (sub-micrometer) changes in surface deformation. When a test object is subjected to an appropriate change in load, a proportional strain is induced on the test surface. If underlying surface discontinuities are present, the surface will deform unevenly which is interpreted through the interferometer as a shearographic image. Shearograpy allows users to measure and qualify large surfaces quickly and efficiently, yielding near real-time results.

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