Visualization of additive-type moiré and time-average fringe patterns using the continuous wavelet transform

Applied Optics
Krzysztof Pokorski, Krzysztof Patorski

Abstract

An application of the continuous wavelet transform to modulation extraction of additive moiré fringes and time-average patterns is proposed. We present numerical studies of the influence of various parameters of the wavelet transformation itself and a fringe pattern under study on the demodulation results. To facilitate the task of demodulating a signal with zero crossing values, a two-frame approach for wavelet ridge extraction is proposed. Experimental studies of vibration mode patterns by time-average interferometry provide excellent verification of numerical findings. They compare very well with the results of our previous investigations using the temporal phase-shifting method widely considered as the most accurate one. No need of performing phase shifting represents significant simplification of the experimental procedure.

References

Jun 21, 2008·Applied Optics·Sikun LiXianyu Su
May 15, 1987·Applied Optics·K PatorskiY Guo
Jul 1, 1989·Applied Optics·J S LimM S Chung
Feb 10, 1994·Applied Optics·G O Rosvold

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Citations

Sep 4, 2020·Scientific Reports·Vladimir SaveljevGwanghee Heo
Dec 25, 2012·Applied Optics·Krzysztof Pokorski, Krzysztof Patorski
Feb 24, 2011·Applied Optics·Krzysztof Patorski, Krzysztof Pokorski
Jan 26, 2012·Optics Express·Krzysztof PatorskiMaciej Trusiak
Oct 10, 2013·Optics Express·Krzysztof Pokorski, Krzysztof Patorski
Jul 16, 2021·Applied Optics·Jiajia Jiang, Hongwei Guo

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