LOW COHERENCE INTERFEROMETRIC SYSTEM FOR PHASE STEPPING SHEAROGRAPHY COMBINED WITH 3D SURFACE SHAPE MEASUREMENT

摘要

PROBLEM TO BE SOLVED: To provide a portable industrial instrument for performing, in an integrated and two-way manner, an interferometric fringe projection and shearography, on an object to be tested.;SOLUTION: When a two-way interferometer (1) is associated with a coherent or quasi-coherent projection device (2), the portable industrial instrument is able to measure the 3D shape of the object by interferometric fringe projection, also known as moire method, and, when the two-way interferometer (1) is associated with a recording or imaging device (4), the instrument is able to perform shearographic measurements on the object, the direction of the traversing light beam in the interferometer (1) being reversed when shifting from one measurement configuration to the other one.;COPYRIGHT: (C)2013,JPO&INPIT