Polo Universitario Of Volta Redonda Uff

Volta Redonda, Brazil

Polo Universitario Of Volta Redonda Uff

Volta Redonda, Brazil
SEARCH FILTERS
Time filter
Source Type

Sampaio A.L.,Polo Universitario Of Volta Redonda Uff | Lobao D.C.,Polo Universitario Of Volta Redonda Uff | Dos Santos P.A.M.,Institute Fisica UFF | Silva L.,Polo Universitario Of Volta Redonda Uff | Huguenin J.A.O.,Polo Universitario Of Volta Redonda Uff
Optics and Lasers in Engineering | Year: 2011

In this paper, we present a study of metallic surface roughness using the Hurst exponent calculated from speckle pattern. A set of samples was prepared using polishing techniques and the roughness was directly measured by means of an optical profilometer. To study the H exponent, an experiment was performed by illuminating the samples using an expanded laser beam and the surface image was captured by a CCD camera. We applied techniques of the Hurst exponent calculation, traditionally calculated from surface profile, in the digitalized speckle patterns generated by the rough surfaces. We showed a clear dependence of the H exponent on roughness of the samples. We demonstrated that this tool is very sensitive to defects in the surfaces and can be used for roughness control. © 2010 Elsevier Ltd. All rights reserved.

Loading Polo Universitario Of Volta Redonda Uff collaborators
Loading Polo Universitario Of Volta Redonda Uff collaborators