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Holographic Moire, An Optical Tool For The Determination Of Displacements, Strains, Contours, And Slopes Of Surfaces
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1982
Year
HolographyEngineeringMicroscopyOptical TestingMechanical EngineeringInterferometryHolographic MethodDigital HolographyCoherent Gradient SensingOptical PropertiesConventional Holographic InterferometryHolographic MoireBiophysicsGeometric ModelingPhysicsHolographic InterferometryOptical ComponentsCrystallographyApplied PhysicsOptical ToolMoire MethodSurface ModelingMedicine
In conventional holographic interferometry, the observed fringe patterns are determined by the object displacement and deformation, and by the illumination and observation configurations. The obtained information may not be in the most convenient form for further data processing. To overcome this problem, and to create new possibilities, holographic fringe patterns can be changed by modifying the optical setup. As a result of these modifications, well-known procedures of the moire method can be applied to holographic interferometry. Components of displacement and components of the strain tensor can be isolated and measured separately. Surface contours and slopes can also be determined.