Study of the surface roughness in metals with different surface finishing by two-dimensional correlation of laser speckle pattern

Miguel Asmad; Guillermo Baldwin-Olguin; C. Maczeyzik; Fernando Mendoza Santoyo; Carlos Perez-Lopez

doi:10.1117/12.591731

21 October 2004 Study of the surface roughness in metals with different surface finishing by two-dimensional correlation of laser speckle pattern

Miguel Asmad, Guillermo Baldwin-Olguin, C. Maczeyzik, Fernando Mendoza Santoyo, Carlos Perez-Lopez

Author Affiliations +

Proceedings Volume 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications; (2004) https://doi.org/10.1117/12.591731
Event: 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, 2004, Porlamar, Venezuela

Abstract

In this work we use an experimental setup implemented in the Optical Physics Laboratory of PUCP, in order to study and to measure the roughness of surfaces with different surface finishing as milling, turning, etc. The measurement method is based on a two-dimensional scan of scattered light like from rough metal surface when the surface is illuminated by laser light. The light is scattered likes speckle in all space and arrives onto the CCD of a digital camera. The speckle images of rough surfaces are captured at different angles of illumination. We have analyzed the dependence between the structure of speckle and the surface roughness. Using two-dimensional Fast Fourier Transform it has been possible to compute the correlation between speckle pattern images and find out the relationship between surface roughness and speckle patterns decorrelation for different metal surface finishing.

Citation Download Citation

Miguel Asmad, Guillermo Baldwin-Olguin, C. Maczeyzik, Fernando Mendoza Santoyo, and Carlos Perez-Lopez "Study of the surface roughness in metals with different surface finishing by two-dimensional correlation of laser speckle pattern", Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); https://doi.org/10.1117/12.591731

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