Shearography is a non-destructive testing (NDT) technique used primarily for the detection of defects in materials and structures. It utilizes the principles of laser interferometry to measure the displacement of a surface when subjected to various forms of loading, such as thermal, mechanical, or vibrational loads. The process generally involves the following steps: 1. **Laser Illumination**: A coherent laser light is directed onto the surface of the object being tested.
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