14 September 2016 2D Hilbert transform for phase retrieval of speckle fields
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Abstract
The paper presents principal approaches to diagnosing the structure forming skeleton of the complex optical field. An analysis of optical field singularity algorithms depending on intensity discretization and image resolution has been carried out. An optimal approach is chosen, which allows to bring much closer the solution of the phase problem of localization speckle-field special points. The use of a “window” 2D Hilbert transform for reconstruction of the phase distribution of the intensity of a speckle field is proposed. It is shown that the advantage of this approach consists in the invariance of a phase map to a change of the position of the kernel of transformation and in a possibility to reconstruct the structure-forming elements of the skeleton of an optical field, including singular points and saddle points. We demonstrate the possibility to reconstruct the equi-phase lines within a narrow confidence interval, and introduce an additional algorithm for solving the phase problem for random 2D intensity distributions.
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M. P. Gorsky, M. P. Gorsky, P. A. Ryabyi, P. A. Ryabyi, D. I. Ivanskyi, D. I. Ivanskyi, } "2D Hilbert transform for phase retrieval of speckle fields", Proc. SPIE 9970, Optics and Photonics for Information Processing X, 99701N (14 September 2016); doi: 10.1117/12.2238138; https://doi.org/10.1117/12.2238138
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