White Light Optical Processing Of Speckle Interferograms

F. T.S. Yu; P. H. Ruterbusch; G. R. Gerhart

doi:10.1117/12.933955

7 July 1983 White Light Optical Processing Of Speckle Interferograms

F. T.S. Yu, P. H. Ruterbusch, G. R. Gerhart

Proceedings Volume 0353, Industrial and Commercial Applications of Holography; (1983) https://doi.org/10.1117/12.933955
Event: 26th Annual Technical Symposium, 1982, San Diego, United States

Abstract

A technique of white-light color encoding of misfocused speckle interferometric fringe patterns is presented. The encoding is performed in the spatial frequency plane with color filters. This technique allows the viewing of a multiset of encoded speckle interferograms simultaneously. Thus it may provide new informational interferometric aspects of the object under stress or vibration. The effect on the speckle fringe pattern due to the spatial filtering is briefly discussed and experimental demonstrations of color encoded fringe patterns are presented. Due to the simplicity and versatility of the processing technique, we feel that the technique may develop into a practical tool for strain, stress and vibrational measurement.

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F. T.S. Yu, P. H. Ruterbusch, and G. R. Gerhart "White Light Optical Processing Of Speckle Interferograms", Proc. SPIE 0353, Industrial and Commercial Applications of Holography, (7 July 1983); https://doi.org/10.1117/12.933955

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KEYWORDS

Speckle

Fringe analysis

Spatial filters

Spatial frequencies

Bandpass filters

Interferometry

Computer programming

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