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Proceedings Paper

Periodic Structure Defects In Mechanical Surfaces Diagnosed Through Diffraction Phenomena Analysis
Author(s): E. H. Soubari; C. Liegeois; P. Meyrueis; C. Gateau
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Paper Abstract

Periodic surface defects in mechanical industry, caused for instance by cavitation, are very difficult to analyze when the size of the defects is too small for conventional methods of analysis. The use of coherent light with grazing angle allows us to process the diffraction phenomena through a Fourier transform device, to obtain data concerning the size, distribution, and shape characteristics of periodic effects. The results are very promising in geophysics for the study of natural periodic materials (surface and particle) and in the study of damage caused by cavitation in hydraulic equipment for nuclear power and in the petroleum industry. The data are analyzed with very simple equipment. Other applications of this process are possible. We are working on a coupling of computers for very fast and large scale automatized control.

Paper Details

Date Published: 10 February 1981
PDF: 8 pages
Proc. SPIE 0240, Periodic Structures, Gratings, Moire Patterns, and Diffraction Phenomena I, (10 February 1981); doi: 10.1117/12.965674
Show Author Affiliations
E. H. Soubari, Louis Pasteur University (France)
C. Liegeois, Louis Pasteur University, (France)
P. Meyrueis, Louis Pasteur University (France)
C. Gateau, Louis Pasteur University (France)

Published in SPIE Proceedings Vol. 0240:
Periodic Structures, Gratings, Moire Patterns, and Diffraction Phenomena I
C. H. Chi; E. G. Loewen; C. L. O'Bryan III, Editor(s)

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