Continuous wavelet transform analysis and visualization of additive type moire and time-average fringe patterns

Krzysztof Pokorski; Krzysztof Patorski

doi:10.1117/12.881543

14 December 2010 Continuous wavelet transform analysis and visualization of additive type moire and time-average fringe patterns

Krzysztof Pokorski, Krzysztof Patorski

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Proceedings Volume 7746, 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 77460G (2010) https://doi.org/10.1117/12.881543
Event: 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2010, Liptovsky Jan, Slovakia

Abstract

An application of the continuous wavelet transform (CWT) to modulation extraction of additive moir´e fringes and time-average patterns is described. To facilitate the task of demodulating a signal with zero crossing values a two frame approach for the wavelet ridge extraction is proposed. Experimental studies of resonance vibration mode patterns by time-average interferometry provide verification of numerical findings. They agree very well with our previous investigation results obtained using the temporal phase shifting method. No need of performing phase shifting represents significant simplification of the experimental procedure.

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Krzysztof Pokorski and Krzysztof Patorski "Continuous wavelet transform analysis and visualization of additive type moire and time-average fringe patterns", Proc. SPIE 7746, 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 77460G (14 December 2010); https://doi.org/10.1117/12.881543

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KEYWORDS

Modulation

Wavelets

Continuous wavelet transforms

Fringe analysis

Phase shift keying

Spatial frequencies

Superposition

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