کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
745178 894415 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hurst exponent determination for digital speckle patterns in roughness control of metallic surfaces
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Hurst exponent determination for digital speckle patterns in roughness control of metallic surfaces
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 49, Issue 1, January 2011, Pages 32–35
نویسندگان
, , , , , ,