Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. analysis and testing techniques
6. interferometry

Anotations

Scope note:

Refers to an optical technique which enables interferometric measurements of surface displacements. When laser light is scattered by a rough surface it generates a random intensity distribution known as a speckle pattern.The technique allows visualization and measurement of the three dimensional distribution of displacement and strain/stress on the object.