Filtering the complex field in phase shifting interferometry

Kemao Qian; Hock Soon Seah; Anand Krishna Asundi

doi:10.1117/1.1609457

1 October 2003 Filtering the complex field in phase shifting interferometry

Kemao Qian, Hock Soon Seah, Anand Krishna Asundi

Optical Engineering, Vol. 42, Issue 10, (October 2003). https://doi.org/10.1117/1.1609457

A simple but effective filtering scheme in phase shifting interferometry is proposed. Conventionally, either the phase-shifted fringe patterns, or the resulting wrapped phase field, is chosen for filtering to remove noise. In this letter, we propose filtering the complex field resulting from the combination of the phase-shifted fringe patterns, as a third choice. The filtering can be realized by Fourier transform or windowed Fourier transform. Processing results of speckle fringes are given to show its effectiveness.

©(2003) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Kemao Qian, Hock Soon Seah, and Anand Krishna Asundi "Filtering the complex field in phase shifting interferometry," Optical Engineering 42(10), (1 October 2003). https://doi.org/10.1117/1.1609457

Published: 1 October 2003

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