Surface inspection via projection interferometry

Projection 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...

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Bibliographic Details
Published inApplied optics (2004) Vol. 27; no. 22; p. 4626
Main Authors Wygant, R W, Almeida, S P, Soares, O D
Format Journal Article
LanguageEnglish
Published United States 15.11.1988
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Summary:Projection 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.
ISSN:1559-128X
DOI:10.1364/AO.27.004626