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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

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Phase retrieval algorithms for lensless imaging using diffractive shearing interferometry.

A P Konijnenberg, A C C de Beurs, G S M Jansen

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|June 17, 2020

Summary

This summary is machine-generated.

Diffractive shearing interferometry (DSI) lensless imaging can have multiple solutions. A tighter support constraint or new algorithms, analogous to coherent diffractive imaging, eliminate these ambiguities for accurate object reconstruction.

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Area of Science:

Optics and Photonics
Image Reconstruction
X-ray Imaging

Background:

Diffractive shearing interferometry (DSI) is an emerging lensless imaging technique.
It utilizes extreme ultraviolet (EUV) radiation from high-harmonic generation (HHG).
Understanding solution uniqueness is crucial for reliable DSI reconstructions.

Purpose of the Study:

Investigate the uniqueness of solutions in DSI.
Determine the necessary support constraint size for unique reconstructions.
Develop and evaluate a novel DSI algorithm.

Main Methods:

Analysis of DSI solution space to identify ambiguities.
Simulation and testing of various support constraint sizes.
Development of a new DSI algorithm inspired by coherent diffractive imaging (CDI) methods.
Comparison of the new algorithm with existing DSI approaches.

Main Results:

DSI solutions can exhibit ambiguities, appearing as displaced copies of the object.
Sufficiently tight support constraints or synthetic constraints resolve these ambiguities.
A new DSI algorithm, analogous to the CDI error reduction algorithm, was proposed.
The new algorithm demonstrates suitability for refining DSI reconstructions.

Conclusions:

The uniqueness of DSI reconstructions depends on constraint enforcement.
Novel algorithms can enhance the accuracy and reliability of DSI.
This work advances DSI capabilities for lensless imaging applications.