Comparison of Surface Roughness Measurement in Dichromatic Speckle Patterns with Autocorrelation Method

Abstract:

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Applying autocorrelation method to process laser speckle patterns, the relation between surface roughness and speckle elongation and correlation length of autocorrelation function can be obtained, and the measured surface roughness can be achieved based on this relation. One-dimension autocorrelation and two-dimension autocorrelation function are used, Moreover, surface roughness is evaluated by speckle elongation and correlation length of autocorrelation function. Aspect ratio of speckle granular represents speckle elongation ratio, which eliminates effects of speckle granular average size on measurement results compared to other methods using before. It has high reliability and efficiency in surface roughness measurement evaluation.

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

680-683

DOI:

10.4028/www.scientific.net/AMR.189-193.680

Citation:

Z. H. Yuan et al., "Comparison of Surface Roughness Measurement in Dichromatic Speckle Patterns with Autocorrelation Method", Advanced Materials Research, Vols. 189-193, pp. 680-683, 2011

Online since:

February 2011

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Price:

$35.00

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