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Proceedings Article

New seven-sample symmetrical phase-shifting algorithm

[+] Author Affiliations
Kieran G. Larkin, Bozenko F. Oreb

CSIRO (Australia)

Proc. SPIE 1755, Interferometry: Techniques and Analysis, 2 (February 5, 1993); doi:10.1117/12.140762
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From Conference Volume 1755

  • Interferometry: Techniques and Analysis
  • Gordon M. Brown; Osuk Y. Kwon; Malgorzata Kujawinska; Graeme T. Reid
  • San Diego, CA | July 19, 1992


A new seven-sample algorithm has been developed which is particularly useful for phase evaluation in systems with non-sinusoidal periodic waveforms. The algorithm performs well in systems with significant amounts of second, third, fourth, and sixth harmonic content and in the presence of phase shift errors. The algorithm is characterized by an equi-spaced symmetrical sampling pattern in which the end samples are one full period apart. Principal features of the algorithm in terms of the Fourier theory of phase-shifting are presented. Performance of the seven-sample algorithm is outlined and compared with several conventional algorithms.

© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Kieran G. Larkin and Bozenko F. Oreb
"New seven-sample symmetrical phase-shifting algorithm", Proc. SPIE 1755, Interferometry: Techniques and Analysis, 2 (February 5, 1993); doi:10.1117/12.140762; http://dx.doi.org/10.1117/12.140762

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