Virginia TechWygant, R. W.Almeida, S. P.Soares, O. D. D.2014-04-042014-04-041988-05Roger W. Wygant, Silverio P. Almeida, and Oliverio D. D. Soares , "Surface inspection via projection interferometry," Appl. Opt. 27, 4626-4630 (1988). doi: 10.1364/AO.27.0046260003-6935http://hdl.handle.net/10919/46966Projection fringe interferometry provides a useful technique for nondestructive surface analysis. Two beam interferometric fringes were projected onto a block of aluminum whose surface had various types of grooves cut into it. The fringes were digitized and analyzed via an automatic fringe tracking algorithm. Three-dimensional topographical maps of the surface's microstructure are presented together with a statistical analysis of surface parameters including average roughness, height distributions, and the autocorrelation function.application/pdfenIn CopyrightArticle - Refereedhttp://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-27-22-4626https://doi.org/10.1364/AO.27.004626