Abstract
An improved phase retrieval method based the Hilbert transform is introduced to quantitatively calculate the phase distribution from the distorted fringe pattern. Also phase measurement deflectomety is widely used in specular-type samples. The background noise or background should be suppressed prior to applying Hilbert transform. In this process, a method for suppressing the background noise the double Hilbert transform, fast, automated, which requires only one image, is presented. The method is easy to implement, and measurements can be conducted. We used the double Hilbert transform method to retrieve the phase and suppressed the background in computer simulations and experiments involving the phase measuring deflectometry method.
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Na, S., Yu, Y. & Shin, S. Three-dimensional measurements by using deflectometry and the double Hilbert transform. Journal of the Korean Physical Society 69, 286–290 (2016). https://doi.org/10.3938/jkps.69.286
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DOI: https://doi.org/10.3938/jkps.69.286