Linear rugosity concept of crystalline surfaces by using the unidirectional laser oblique illumination (ULOI)...

The study of the I(phi) curves obtained with Unidirectional Laser Oblique Illumination describes the roughness of a crystal as a combination of straight edges in different directions, which generate the concept of linear rugosity. In the present work, a model of the crystalline surface based on this concept is introduced. Diffraction gratings as well as metallic surfaces subjected to different metallographic procedures are analyzed. The theoretical results are compared with experimental values obtained in samples of Fe and Zn using an objective of 16x. Both values, theoretical and experimental, are in total concordance.