Surface Topography of Non-optical Surfaces by Projected Interference Fringes

Rowe, Stephen; Welford, W.T.

doi:10.1038/216786a0

Cited by 45 publications

(11 citation statements)

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“…This type of a pattern is more easily analyzed than a pattern containing closed loop fringes, and does not present ambiguities as to the sign of height deviations. The PIFI arrangement proposed by Rowe and Welford [1][2][3] , was shown to be equivalent to holographic techniques by MacGovern [4]. The interference of two obliquely intersecting beams has been treated in explicit detail by Leonhardt [5].…”

Section: Theory Of Interferogramsmentioning

confidence: 99%

Surface Micro-Topography By Automatic Processing Of Projected Interference Fringes

Wygant

Almeida

Soares³

1988

SPIE Proceedings

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Micro -topographic analysis of surfaces, particularly of the non -optical type are of great interest in various areas of science and technology.A technique and results on topographic mapping of surfaces are presented. Essentially, the method uses advanced software for image processing of the pattern of the contouring fringes resulting on the surface from illumination by collimated interference fringes.Inherent noise inconvenients are overcome by specially conceived algorithms leading to a best fit symbolic fringe pattern (ideal contouring fringes). From the topological map, statistical parameters are evaluated to characterize the surface.These include: range and distribution of surface heights, average roughness and the auto -correlation function of the surface.

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Section: Theory Of Interferogramsmentioning

confidence: 99%

Surface Micro-Topography By Automatic Processing Of Projected Interference Fringes

Wygant

Almeida

Soares³

1988

SPIE Proceedings

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“…Rowe and Welford (1967) devised a simple approach for measuring surface contours by projecting interference fringes or a grating onto an object and then viewing the fringes from another angle. Fringe projection is related to optical triangulation, which uses a single point of light and light sectioning; a single line is projected onto an object and then viewed from a different direction.…”

Section: Fringe Projectionmentioning

confidence: 99%

Interferometric Techniques

Schmit

Creath²

2003

Digital Encyclopedia of Applied Physics

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“…one is using phase information coding via two beams interference to code metrologically the space (see equation 1,Ref. 9) has raised the question whether the fringe patterns could be deliberately generated by beam modulation (carrier characteristics inherent to the illumination), according to convenient rules.…”

Section: Introductionmentioning

confidence: 99%

“…Structured light illuminating methods based on projected interference fringes were earlier proposed for non-optical surfaces (1)(2)(3). The foundation of the method were considered with common roots to holographic interferometry (4).…”

Section: Introductionmentioning

confidence: 99%

Computer-Aided Surface Analysis la Fringe Projection

Soares

Almeida

Gomes

1989

Industrial Inspection

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Three -dimensional topography of non -optical surfaces has been measured by projection fringe interferometry and developed computer algorithm decoding. Fundamental parameters characterizing the roughness of tested surface were evaluated. The resolution dynamic range was shown to present a large span from submicron to millimeters according to frequency carrier adjustment. The demonstrated technique has presented significant advantages over mechanical based profilometry and other optical techniques. However, the application of the method appears to extend beyond conventional mechanical surface analysis. Further, it was brought to evidence the possibilities of conceiving other methods of surface topographic metrology by laser beam modulation.

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Surface Topography of Non-optical Surfaces by Projected Interference Fringes

Cited by 45 publications

References 1 publication

Surface Micro-Topography By Automatic Processing Of Projected Interference Fringes

Surface Micro-Topography By Automatic Processing Of Projected Interference Fringes

Interferometric Techniques

Computer-Aided Surface Analysis la Fringe Projection

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