The big virtue of this technique is based on the fact of being non-destructive and of non-contact, i.e., the unique physical interaction between the sample and the system of measurement occurs through a light beam. Besides, depending on the configurations used, it is possible to measure those parameters from centesimal to hundreds of microns.

Various methods allow the analysis of the fringes acquired in order to obtain information about the surface displacements. One of the most powerful and precise methods, which are going to be developed during the project, is the phase stepping. This method can be implemented using an appropriated image processing software, such as MATLAB?, for example, which allow access to the numerical matrix that correspond to the image.

For the developing of the project, the group is equipped with an optical apparatus (LASERs, anti-vibration table, lenses, piezoeletrical motors etc) and devices for image acquirement and analysis (CCD camera, image capture board, computer).

In the present project, we propose the study of the application of these DSPI techniques in engineering problems, mainly in the form of non-destructive tests related to experimental determination of mechanical properties and evaluation of mechanical behavior of materials, under the most variable stressing conditions.