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Measurement of Curved Surface Roughness by Polychromatic Speckle Method

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Abstract:

The influence of curved surface on the method of polychromatic speckle autocorrelation measuring surface roughness is studied by introducing the curvature radius of surface. The rough surface, and the dichromatic speckle patterns, and trichromatic speckle patterns are simulated, and the effects of different radius of curved surface on speckle patterns and speckle elongation ratio are discussed. The results show that the larger curvature radius is, the larger speckle elongation becomes, and the smaller the deviation of measured surface roughness is. Therefore, influence of curvature of rough surface on measurement precision should be taken into consideration during measuring process.

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Periodical:

Advanced Materials Research (Volumes 538-541)

Pages:

256-259

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.538-541.256

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Online since:

June 2012

Authors:

Jing Huang, Zong Heng Yuan, Yi Fan Ge

Keywords:

Autocorrelation, Optical Measurement, Speckle Elongation, Surface Roughness (SR)

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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