@ARTICLE{Salazar_F._On_2012, author={Salazar, F. and Belenguer, T. and García, J. and Ramos, G.}, number={No 2}, journal={Metrology and Measurement Systems}, pages={373-380}, howpublished={online}, year={2012}, publisher={Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation}, abstract={In this work, the influence of both characteristics of the lens and misalignment of the incident beams on roughness measurement is presented. To investigate how the focal length and diameter affect the degree of correlation between the speckle patterns, a set of experiments with different lenses is performed. On the other hand, the roughness when the beams separated by an amount are non-coincident at the same point on the sample is measured. To conclude the study, the uncertainty of the method is calculated.}, type={Artykuły / Articles}, title={On Roughness Measurement by Angular Speckle Correlation}, URL={http://www.journals.pan.pl/Content/89931/PDF/Journal10178-VolumeXIX%20Issue2_17paper.pdf}, doi={10.2478/v10178-012-0032-9}, keywords={roughness, speckle, non-destructive testing}, }