Abstract
A phase demodulation scheme using a discrete Hilbert transform that can change the interferometric phase by π/2 has been investigated. In-quadrature components of a fringe pattern are obtained from one captured interferogram using a one-dimensional (1-D) discrete Hilbert transform and a 1-D discrete high-pass filtering that are based on a digital signal processing technique. The phase distribution in the range of 15π (rad) can be demodulated with the proposed method. The 1-D discrete Hilbert transform can be extended to two-dimensional calculation with a raster scanning procedure. © 2005 The Optical Society of Japan
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Onodera, R., Watanabe, H. & Ishii, Y. Interferometric Phase-Measurement Using a One-Dimensional Discrete Hilbert Transform. OPT REV 12, 29–36 (2005). https://doi.org/10.1007/s10043-005-0029-7
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DOI: https://doi.org/10.1007/s10043-005-0029-7