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Proceedings Paper

New seven-sample symmetrical phase-shifting algorithm
Author(s): Kieran G. Larkin; Bozenko F. Oreb
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Paper Abstract

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.

Paper Details

Date Published: 5 February 1993
PDF: 10 pages
Proc. SPIE 1755, Interferometry: Techniques and Analysis, (5 February 1993); doi: 10.1117/12.140762
Show Author Affiliations
Kieran G. Larkin, CSIRO (Australia)
Bozenko F. Oreb, CSIRO (Australia)


Published in SPIE Proceedings Vol. 1755:
Interferometry: Techniques and Analysis
Gordon M. Brown; Osuk Y. Kwon; Malgorzata Kujawinska; Graeme T. Reid, Editor(s)

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