Abstract

In conventional multiple-plane phase retrieval method, the wave propagations that proceed in the same ordered sequence could slow down convergence or lead to stagnation. In this Letter, a novel, to the best of our knowledge, algorithmic technique to accelerate phase retrieval using an unordered sequence of propagations is demonstrated experimentally. The main advantage of the technique is the significant increase in the change in amplitude, a key and essential element for a successful iterative phase retrieval. For N planes, the number of possible ways to implement the sequence of propagations is increased by a factor of N!(N1)!, providing diversity for the change in the amplitude. Compared to the conventional algorithm, the technique performed 2 times faster and reduced the number of needed intensity patterns for the test object wave used. The technique may be adopted in the other multiple intensity-based phase retrieval methods.

© 2019 Optical Society of America

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Supplementary Material (2)

NameDescription
» Visualization 1       This is the accompanying video for Figure 1 which shows the algorithm sequence for O-SBMIR, HOHU-SBMIR, and U-SBMIR.
» Visualization 2       This is the accompanying video for Figure 2 which shows the reconstructions in the phase from the first 70 iterations of O-SBMIR, HOHU-SBMIR, and U-SBMIR. The object here is an aperture with a spherical phase.

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