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Multiwavelength surface contouring from phase-coded noisy diffraction patterns: Wavelength-division optical setup

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Original languageEnglish
Article number085105
JournalOptical Engineering
Issue number8
Publication statusPublished - 1 Aug 2018
Publication typeA1 Journal article-refereed


We propose an algorithm for absolute phase retrieval from multiwavelength noisy phase coded diffraction patterns. A lensless optical system is considered with a set of successive single wavelength experiments (wavelength-division setup). The phase masks are applied for modulation of the multiwavelength object wavefronts. The algorithm uses the forward/backward propagation for coherent light beams and sparsely encoding wavefronts, which leads to the complex-domain block-matching three-dimensional filtering. The key-element of the algorithm is an original aggregation of the multiwavelength object wavefronts for high-dynamic-range absolute phase reconstruction. Simulation tests demonstrate that the developed approach leads to the effective solutions explicitly using the sparsity for noise suppression and high-accuracy object absolute phase reconstruction from noisy data.


  • absolute phase retrieval, discrete optical signal processing, multiwavelength phase retrieval, phase imaging, surface contouring

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Field of science, Statistics Finland