2. Holographic interferometry

Holographic interferometry is capable of giving a very precise idea of the real, global behavior of a mechanical assembly or a physical phenomenon in general, without disturbing it (non-contact method). This assembly, or phenomenon, can be very small and possibly inaccessible (in which case holographic microscopy and endoscopy are used) or very large (vibration of a section of engineering structure or a car in operation, for example).

It is not only a global visualization method, but also a quantitative measurement method for static or dynamic three-dimensional phenomena. It is also a high-performance method of non-destructive testing.

Its introduction into the industry, which has increased sharply in recent years, is due to advances in computer processing of holographic images and data collection (high-resolution CCD cameras). Computers...