global-journal-of-research-in-engineering-c-chemical-engineering Global Journal of Research in Engineering - C: Chemical Engineering 0975-5861 2249-4596 Global Journals Publishing Group Incorporated 74819 Detection of Microstructure of Roughness by Optical Method DairaDr. R. ALGERIA, Physico Chemistry of Surfaces and interfaces Research Laboratory of Skikda (LRPCSI), Algeria. 15 01 2012 12 C2 21 26

Problem stastement : The digital holography technique, used in measuring the deformations of the scatterers, the process is based on subtraction of interference patterns. A first image is recorded before the deformation of the object in the RAM of a computer, a second followed after deformation. The square of the difference between the two images provides correlation fringes in real time directly observable on the monitor. Results : The interpretation of these fringes to determine the deformation. Conclusion : In this paper, we present experimental results of the variation of diffraction patterns for various displacements of paper.

 Non destructive control Aluminium Interferometry treatment of image. Full Text

Problem stastement : The digital holography technique, used in measuring the deformations of the scatterers, the process is based on subtraction of interference patterns. A first image is recorded before the deformation of the object in the RAM of a computer, a second followed after deformation. The square of the difference between the two images provides correlation fringes in real time directly observable on the monitor. Results : The interpretation of these fringes to determine the deformation. Conclusion : In this paper, we present experimental results of the variation of diffraction patterns for various displacements of paper.