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

Narrower term/s

• laser Doppler vibrometry
• holographic interferometry
• electronic speckle pattern interferometry
• shearography

Anotations

Scope note:

The use of an optical interferometer for a wide variety of metrological and spectroscopic applications that study the interference pattern (or "fringe") established when a single beam of light multiply divided into beams traveling unequal paths is reunited.