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Roughness determination by direct visual observation of the speckle pattern |
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| Authors: | M A Rebollo M R Landau E N Hogert N G Gaggioli M Muramatsu |
| Institution: | a MAR is in the Facultad de Ingeniería de la UBA, Lab. Laser Paseo Colón 850, 1063, Buenos Aires, Argentina b MRL, ENH and NGG are with the Comisión Nacional de Energia Atómica, Gcia. de Desarrollo, Dpto INEND, Grupo de Optica y Laser Av. del Libertador 8250, 1429, Buenos Aires, Argentina c MM is at the Universidade de Sao Paulo, Instituto de Fisica Rua do Matao, s/n. Cidade Universitária 05508-, Sao Paulo, SP, Brasil d NGG is also with the Consejo Nacional de Investigaciones Cientíaficas y Técnicas de la República Argentina, Argentina |
| Abstract: | There are mechanical and optical methods of measuring the roughness of surfaces. Mechanical methods are of a destructive type, while optical methods, although they are non-destructive, involve relatively complex systems and calculations. In this work a simple method is introduced, which allows one—through the direct observation of the speckle pattern—to make a visual correlation, comparing the first pattern with others obtained when the beam incidence angle varies. With this method it is possible to obtain results with acceptable accuracy for many industrial uses. |
| Keywords: | surfaces roughness vision correlation |
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