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Title: Surface-roughness study using laser speckle method
Authors: Toh, S.L. 
Shang, H.M. 
Tay, C.J. 
Issue Date: Feb-1998
Citation: Toh, S.L., Shang, H.M., Tay, C.J. (1998-02). Surface-roughness study using laser speckle method. Optics and Lasers in Engineering 29 (2-3) : 217-225. ScholarBank@NUS Repository.
Abstract: Current technique for surface-roughness measurements can be classified into two broad categories: those using a measuring stylus which requires direct contact with the test object and those using non-contacting laser techniques. In this paper, a whole-field speckle method is employed to determine metallic-surface-roughness. The technique enables evaluation of the roughness of particular points on a surface. Six sets of surfaces prepared by a spark-erosion process with roughness ranging from 0.4-12.5 μm have been tested. Different correlation methods were used to process the test data and a practical method of evaluating surface-roughness is proposed.
Source Title: Optics and Lasers in Engineering
ISSN: 01438166
DOI: 10.1016/S0143-8166(97)00087-0
Appears in Collections:Staff Publications

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