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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 32, Iss. 17 — Jun. 10, 1993
  • pp: 3047–3052

Temporal phase-unwrapping algorithm for automated interferogram analysis

J. M. Huntley and H. Saldner  »View Author Affiliations


Applied Optics, Vol. 32, Issue 17, pp. 3047-3052 (1993)
http://dx.doi.org/10.1364/AO.32.003047


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Abstract

A new algorithm is proposed for unwrapping interferometric phase maps. Existing algorithms search the two-dimensional spatial domain for 2π discontinuities: only one phase map is required, but phase errors can propagate outward from regions of high noise, corrupting the rest of the image. An alternative approach based on one-dimensional unwrapping along the time axis is proposed. It is applicable to an important subclass of interferometry applications, in which a sequence of incremental phase maps can be obtained leading up to the final phase-difference map of interest. A particular example is quasi-static deformation analysis. The main advantages are (i) it is inherently simple, (ii) phase errors are constrained within the high-noise regions, and (iii) phase maps containing global discontinuities are unwrapped correctly, provided the positions of the discontinuities remain fixed with time. The possibility of real-time phase unwrapping is also discussed.

© 1993 Optical Society of America

History
Original Manuscript: June 29, 1992
Published: June 10, 1993

Citation
J. M. Huntley and H. Saldner, "Temporal phase-unwrapping algorithm for automated interferogram analysis," Appl. Opt. 32, 3047-3052 (1993)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-32-17-3047


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