A numerical spatial carrier for single fringe pattern analysis algorithm

作者：Bahich Mustapha^*; Afifi Mohamed; Barj Elmostafa

来源：Optik, 2011, 122(20): 1821-1824.

DOI：10.1016/j.ijleo.2010.11.010

• Phase extraction
• Fringe pattern
• Spatial carrier
• Continuous wavelet transform
• Hilbert transform

Hilbert transform and continuous wavelet transform are combined to form an algorithm for the analysis of a single fringe pattern with open or closed fringes. Only one recorded fringe pattern is needed to extract the phase information. A second pi/2 phase shifted fringe pattern should first be generated from the other using Hilbert transform to superpose numerically the spatial carrier. Several phase extraction techniques are conceived to demodulate fringe patterns. In this paper, the wavelet technique is used to obtain the required phase distribution. The algorithm offers an advantage that it is appropriate when the spatial carrier is impossible to be added experimentally. Finally, a simulation was carried out to validate the algorithm, giving good results.

• 出版日期2011