New seven-sample symmetrical phase-shifting algorithm

Kieran G. Larkin; Bozenko F. Oreb

doi:10.1117/12.140762

5 February 1993 New seven-sample symmetrical phase-shifting algorithm

Kieran G. Larkin, Bozenko F. Oreb

Proceedings Volume 1755, Interferometry: Techniques and Analysis; (1993) https://doi.org/10.1117/12.140762
Event: San Diego '92, 1992, San Diego, CA, United States

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.

Citation Download Citation

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

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