1 March 1988 Speckle-Tracking Point Diffraction Interferometer For Fluid Studies
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Optical Engineering, 27(3), 273197 (1988). doi:10.1117/12.7977911
Abstract
We describe a point diffraction interferometer (PDI) for use in connection with stressed fluids. Since the wavefront distortions are conspicuous, the transmitted field breaks down into a speckle distribution. A speckle chaser has been devised so that a bright speckle is always kept on top of the PDI pinhole. Adequate power for the selfgenerated reference beam is thus available, and fringe visibility remains quite satisfactory even for large optical distortions.
M. Giglio, U. Perini, E. Paganini, "Speckle-Tracking Point Diffraction Interferometer For Fluid Studies," Optical Engineering 27(3), 273197 (1 March 1988). http://dx.doi.org/10.1117/12.7977911
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KEYWORDS
Point diffraction interferometers

Speckle

Adaptive optics

Visibility

Wavefront distortions

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