Wavelet transform method of phase-step determination

• Autorzy: Hu Y. J. , Sheu J. Y. , Lee J. C. , Wu Y. F.
• Języki publikacji: EN

Abstrakty

EN

The phase-shifting technique is the most popular phase-retrieving technique applied in optical testing. Most of the phase retrieval algorithms rely on stability and accuracy of phase steps. A sufficiently exact phase-step calibration is necessary for phase measurements with high accuracy. We introduce a new method for phase-step calibration between interferograms. The method is based on a recently introduced continuous wavelet transform demodulation technique. For the method proposed here only two phase-stepped images are required. Simulation results indicate that the phase shift error of the proposed method is less than 0.05%.

Słowa kluczowe

EN

continuous wavelet transform (CWT); interferometry; phase measurement; fringe pattern

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2012
• Tom: Vol. 42, nr 1
• Strony: 215--221
• Opis fizyczny: bibliogr. 15 poz.

Twórcy

autor

Hu Y. J.

autor

Sheu J. Y.

autor

Lee J. C.

autor

Wu Y. F.

• Department of Electrical Engineering, Taipei Chengshih University of Science and Technology, Taipei, 112 Taiwan

Bibliografia

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