Application of an automatic phase unwrapping method for the quantitative extraction of information from high-resolution interferometric and photo-elastic data

Peter John Bryanston-Cross; Chenggen Quan; John T. Judge

doi:10.1117/12.165456

10 December 1993 Application of an automatic phase unwrapping method for the quantitative extraction of information from high-resolution interferometric and photo-elastic data

Peter John Bryanston-Cross, Chenggen Quan, John T. Judge

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Proceedings Volume 2003, Interferometry VI: Techniques and Analysis; (1993) https://doi.org/10.1117/12.165456
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

This paper describes the application of digital Fourier transform to phase encoded intensity distribution. Attention is drawn to a method of extracting quantitative information automatically from the interferometric fringe data. To achieve this a set of carrier fringes has been added to interferometric fringe data. This has made it possible to form a phase map using a FFT (Fast Fourier Transform) algorithm. A Minimum Spanning Tree (MST) phase unwrapping strategy has been used to create a contiguous map of the whole fringe field. Finally, the measurement parameter related to the fringe field has been calculated from one single image. Experimental results are given for the burner flames, a compressible flow, and photoelastic fringe data.

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Peter John Bryanston-Cross, Chenggen Quan, and John T. Judge "Application of an automatic phase unwrapping method for the quantitative extraction of information from high-resolution interferometric and photo-elastic data", Proc. SPIE 2003, Interferometry VI: Techniques and Analysis, (10 December 1993); https://doi.org/10.1117/12.165456

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KEYWORDS

Interferometry

Fringe analysis

Fourier transforms

Raster graphics

Holography

Chlorine

Photoelasticity

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