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Proceedings Article

Some recent advances for processing a single interferogram with closed fringes

[+] Author Affiliations
Manuel Servin, Francisco J. Cuevas

Ctr. de Investigaciones en Optica A.C. (Mexico)

Proc. SPIE 5531, Interferometry XII: Techniques and Analysis, 395 (August 2, 2004); doi:10.1117/12.559720
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From Conference Volume 5531

  • Interferometry XII: Techniques and Analysis
  • Katherine Creath; Joanna Schmit
  • Denver, CO | August 02, 2004

abstract

In this paper we are going to review two interferometric techniques to demodulate a single fringe pattern containing closed fringes. It is well known that analyzing a single interferogram with spatial carrier is relatively easy [1]. That is, whenever the modulating phase of the interferogram contains a linear component large enough to guarantee that the total modulating phase would remain an increasing function in a given direction of the two dimensional space. Why it is interesting to demodulate a single or a series of interferograms in which there is no spatial or temporal carrier ?, knowing that this is a substantially more difficult task ?. The answer is that although one always tries to obtain a single or a series of interferograms with spatial and/or temporal carrier [2], sometimes the very nature of the experimental set-up do not permit to obtain them. One reason could be that one is studying fast transient phenomena where there is no time to introduce a carrier. In these cases one still wants to demodulate the interferograms to evaluate quantitatively the physical variable under study.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Manuel Servin and Francisco J. Cuevas
"Some recent advances for processing a single interferogram with closed fringes", Proc. SPIE 5531, Interferometry XII: Techniques and Analysis, 395 (August 2, 2004); doi:10.1117/12.559720; http://dx.doi.org/10.1117/12.559720


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