MassThink View Institution's Website 1 article published in JoVE Engineering Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments Sergey V. Baryshev1, Robert A. Erck2, Jerry F. Moore3, Alexander V. Zinovev1, C. Emil Tripa1, Igor V. Veryovkin1 1Materials Science Division, Argonne National Laboratory, 2Energy Systems Division, Argonne National Laboratory, 3MassThink LLC White light microscope interferometry is an optical, noncontact and quick method for measuring the topography of surfaces. It is shown how the method can be applied toward mechanical wear analysis, where wear scars on tribological test samples are analyzed; and in materials science to determine ion beam sputtering or laser ablation volumes and depths.