ISSN: 0090-3973
Published Online: 22 March 2006
Page Count: 6

Surface Roughness Measurement Using Laser Speckle Statistical Analysis

Seif, MA
Alabama A&M University,AL,

Rawwash, M
Yarmouk University,

(Received 15 July 2005; accepted 27 January 2006)

Abstract

This work represents a noncontact nondestructive technique for surface roughness measurement. The technique is based on investigating the statistical properties of the speckle patterns that are developed whenever a surface is illuminated with a highly coherent light source such as a laser. The main objective is to correlate the sizes of the speckles with their light intensities to the surface roughness and profile. Different statistical approaches and correlation analysis have been implemented. Spatial data analysis, or variogram analysis, has been used to develop the relationship between observations taken at various locations. Among the other advantages of such an approach, this technique is simple to implement and suitable for operation in a manufacturing environment.

Keywords:
laser speckles, variogram analysis, surface roughness, correlation analysis, spatial data analysis

Paper ID: JTE100099
DOI: 10.1520/JTE100099
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