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Article | REF: R6331 V1

Speckle interferometry

Author: Paul SMIGIELSKI

Publication date: March 10, 2001

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4. Electronic speckle interferometry or TV-holography

4.1 Principle

Here again, the commercial term TV-holography has become commonplace. Anglo-Saxons still sometimes use the term ESPI (Electronic Speckle Pattern Interferometry).

This is in fact a modified Michelson interferometer, in which one of the mirrors is replaced by the object to be studied. As in the previous case, the photosensitive medium can be a CCD camera if you wish to quantify the results and/or work in real time (figure 12 ).

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Electronic speckle interferometry or TV-holography
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