has been developed in an interferometer of compact and portable memory used to determine surface deformations of an object. The improved interferometer consists of a laser beam, optical and fiber optic devices (55, 57, 59) coupling the beam to one or more decomposers (60) of evanescent waves, and collimating lenses (70) orienting the beam decomposed over one or more networks specimens (51). observation means can be used including cameras and video cameras to watch and record the resulting fringe patterns.
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