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Title: Surface-roughness Study Using Laser Speckle Method
Authors: Toh, S.L. 
Shang, H.M. 
Tay, C.J. 
Issue Date: 26-Mar-1998
Citation: Toh, S.L.,Shang, H.M.,Tay, C.J. (1998-03-26). Surface-roughness Study Using Laser Speckle Method. Optics and Lasers in Engineering 29 (2-6) : 217-225. ScholarBank@NUS Repository.
Abstract: Current techniques 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 sparkerosion 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 practi-cal method of evaluating surface-roughness is proposed. © 1998 Published by Elsevier Science Ltd. All rights reserved.
Source Title: Optics and Lasers in Engineering
ISSN: 01438166
Appears in Collections:Staff Publications

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