Journal of Physics E Scientific Instruments · 1973 · 293 citations · 4 references
Natural SciencesMaterials ScienceDigital ImagingMechanical Behavior Of MaterialsOpticsDisplacement MeasurementHolographyImage FormationInterferometryOptical MetrologySurface MetrologyDisplacementFringe AnalysisHolographic InterferometryInterferometric Displacement MeasurementInterferometric MeasurementInterferometric MetrologyOptical InterferometrySpeckle Interferometry
The surface to be studied is illuminated with laser light and two images are formed, displaced relative to one another in the image. Speckle pattern interferometry is used to measure phase changes between the two images resulting from deformation of the surface. A fringe system is obtained showing contours of constant slope resolved in the direction of image displacement. A comparison is made with result obtained by holographic interferometry.
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