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Proceedings Paper

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

Paper Details

Date Published: 10 December 1993
PDF: 15 pages
Proc. SPIE 2003, Interferometry VI: Techniques and Analysis, (10 December 1993); doi: 10.1117/12.165456
Show Author Affiliations
Peter John Bryanston-Cross, Univ. of Warwick (United Kingdom)
Chenggen Quan, Univ. of Warwick (United Kingdom)
John T. Judge, Univ. of Warwick (United Kingdom)


Published in SPIE Proceedings Vol. 2003:
Interferometry VI: Techniques and Analysis
Osuk Y. Kwon; Gordon M. Brown; Malgorzata Kujawinska, Editor(s)

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