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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

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Published on: February 12, 2014

An improved ptychographical phase retrieval algorithm for diffractive imaging.

Andrew M Maiden¹, John M Rodenburg

¹Department of Electrical and Electronic Engineering, University of Sheffield, UK. a.maiden@sheffield.ac.uk

Ultramicroscopy

|June 23, 2009

Summary

This summary is machine-generated.

The ptychographical iterative engine (PIE) phase retrieval algorithm now works without needing an accurate illumination model. This advancement enhances its applicability in X-ray and optical imaging, offering faster convergence and noise robustness.

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Area of Science:

Coherent diffractive imaging
Phase retrieval algorithms
Computational microscopy

Background:

Ptychographical iterative engine (PIE) is a phase retrieval algorithm.
PIE uses overlapping diffraction patterns from a translated illumination function.
Existing PIE requires an accurate illumination model.

Purpose of the Study:

To extend the PIE algorithm.
To remove the requirement for an accurate illumination function model.
To improve the versatility of PIE for imaging applications.

Main Methods:

Modification of the PIE algorithm.
Development of a new PIE variant that does not require prior knowledge of the illumination function.
Testing the extended PIE with simulated and experimental data.

Main Results:

The extended PIE successfully retrieves phase information without an illumination model.
The algorithm demonstrates robustness to noise.
The extended PIE maintains fast convergence properties.

Conclusions:

The developed PIE extension broadens the applicability of ptychography.
This advancement simplifies experimental setup and data processing.
The method is suitable for various wavelengths, including X-ray and optical.