A New Look at the Theory of Double-Aperture Speckle Photography
Wong, Albert Kai-Wai
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https://hdl.handle.net/2142/71666
Description
Title
A New Look at the Theory of Double-Aperture Speckle Photography
Author(s)
Wong, Albert Kai-Wai
Issue Date
1981
Department of Study
Theoretical and Applied Mechanics
Discipline
Theoretical and Applied Mechanics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Applied Mechanics
Abstract
Scalar diffraction theory is used to derive the final fringe formation equations in a spatial filtering setup for a double-apertures specklegram. Both the pointwise and full-field filtering setups are analyzed. The resulting equations are shown to be more complete and exact than the equations from the conventional Moire analysis.
The range of possible in-plane displacement measurement is analyzed. Several experimental demonstrations are presented. The results agree very well with the equations derived and are within the predicted range of measurement.
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