Surface topography by multisource moiré patterns - Moiré patterns of multisource type yield surface topography

Theocaris, PS; Koutsabessis, A

dc.contributor.author	Theocaris, PS	en
dc.contributor.author	Koutsabessis, A	en
dc.date.accessioned	2014-03-01T01:37:41Z
dc.date.available	2014-03-01T01:37:41Z
dc.date.issued	1968	en
dc.identifier.issn	00144851	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21629
dc.title	Surface topography by multisource moiré patterns - Moiré patterns of multisource type yield surface topography	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF02326131	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF02326131	en
heal.publicationDate	1968	en
heal.abstract	Moiré patterns produced by interference of a series of periodically arranged linear light sources with a line-specimen grating of similar pitch are located at a plane parallel to the sources and the specimen grating and at some distance away from these planes. A transparent or reflecting specimen located at a distance from the specimen grating distorts the image of the multisource projected on the specimen grating due to its surface irregularities and forms a moiré pattern. This pattern yields the partial-slope contours of the topography of the specimen along a direction normal to the lines of the grating. Two such contour patterns taken at mutually perpendicular directions are sufficient to yield the complete topographic picture of the surface. The method was used for determining gradients of thickness variations in two-dimensional specimens due to lateral contraction. The technique is highly accurate in determining the values of thickness in such cases, since the integration of the slope of thickness variation along any traverse of the specimen is a steady and accurate process. © 1968 Society for Experimental Mechanics, Inc.	en
heal.publisher	Kluwer Academic Publishers	en
heal.journalName	Experimental Mechanics	en
dc.identifier.doi	10.1007/BF02326131	en
dc.identifier.volume	8	en
dc.identifier.issue	2	en
dc.identifier.spage	82	en
dc.identifier.epage	87	en