Article | REF: R6331 V1

Speckle interferometry

Author: Paul SMIGIELSKI

Publication date: March 10, 2001

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2. Speckle interferometry: measuring in-plane displacements

2.1 Principle

The object is illuminated symmetrically with parallel laser light (figure 6 ). A photographic lens L forms an image of the object on a photosensitive medium H (usually film or a photographic plate, or a CCD camera) .

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Speckle interferometry: measuring in-plane displacements