2020/07/19 by Nathaniel Hai, Hai, Nathaniel, Joseph Rosen +1
Computer Science · Physics and Astronomy · #Advanced X-ray Imaging Techniques #Digital Holography and Microscopy #FOS: Electrical engineering #FOS: Physical sciences #Image and Video Processing (eess.IV) #Optical measurement and interference techniques #Optics (physics.optics) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2007.09602
openalex publication_date 2020/07/19 · openalex created_date 2020/07/23 · openalex updated_date 2026/07/28
In the last five decades, iterative phase retrieval methods draw large amount of interest across the research community as a non-interferometric approach to recover quantitative phase distributions from one (or more) intensity measurement. However, in cases where a unique solution does exist, these methods often require oversampling and high computational resources, which limits the use of this approach in important applications. On the other hand, phase contrast methods are based on a single camera exposure but provides only a qualitative description of the phase, thus are not useful for applications in which the quantitative phase description is needed. In this study we adopt a combined approach of the two above-mentioned methods to overcome their respective drawbacks. We show that a modified phase retrieval algorithm easily converges to the correct solution by initializing the algorithm with a phase-induced intensity measurement, namely with a phase contrast image of the examined object. Accurate quantitative phase measurements for both binary and continuously varying phase objects are demonstrated to support the suggested system as a single-shot quantitative phase contrast microscope.