OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 31, Iss. 25 — Sep. 1, 1992
  • pp: 5320–5325

Phase-step interferometry of irregular shapes by using an edge-following algorithm

Karl A. Stetson  »View Author Affiliations

Applied Optics, Vol. 31, Issue 25, pp. 5320-5325 (1992)

View Full Text Article

Enhanced HTML    Acrobat PDF (1757 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



This paper presents a method for organizing computations in phase-step interferometry for irregular shapes that is straightforward to program. In addition to data files, which are recorded with incremental phase steps between the interfering beams, this method requires a mask file where the valid pixels can be distinguished from invalid pixels. For example, they may lie above a known threshold. By means of a simple edge-following routine, the program moves around the perimeter of the undone portion of the shape, doing the phase calculations and changing the mask pixels to mark them done. This allows the program to move contiguously from pixels that have been done to those that have not. Modulo 2π ambiguities are avoided by computing the phase differences between neighboring pixels and summing them to obtain individual pixel values.

© 1992 Optical Society of America

Original Manuscript: January 6, 1991
Published: September 1, 1992

Karl A. Stetson, "Phase-step interferometry of irregular shapes by using an edge-following algorithm," Appl. Opt. 31, 5320-5325 (1992)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. K. Creath, “Phase-measurement interferometry techniques,” in Progress in Optics, E. Wolf, ed. (Elsevier, Amsterdam, 1988), pp. 349–393. [CrossRef]
  2. K. A. Stetson, W. R. Brohinsky, “Fringe-shifting technique for numerical analysis of time-average holograms of vibrating objects,” J. Opt. Soc. Am. A 5, 1472–1476 (1988). [CrossRef]
  3. R. J. Prypucniewicz, K. A. Stetson, “Measurement of vibration patterns using electro-optic holography,” in Laser Interferometry. Quantitative Analysis of Interferograms, R. J. Prypucniewicz, ed., Proc. Soc. Photo-Opt. Instrum. Eng.1162, 456–467 (1989).
  4. W. Osten, R. Höfling, “The inverse modulo process is automatic fringe analysis—problems and approaches,” in Proceedings of the Society for Experimental Mechanics Conference on Hologram Interferometry and Speckle Metrology (Society for Experimental Mechanics, Bethel, Conn., 1990), pp. 301–309.
  5. K. A. Stetson, “An electronic system for real-time display and quantitative analysis of hologram interference fringes,” Proc. Laser Inst. Am. 70, 78–85 (1989).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited