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Optimized phase retrieval for accelerated snapshot coherent diffraction imaging via Babinet illumination.

Wei Zhang, Guancheng Huang, Zhengyu Wu

|July 1, 2025

Summary

This study introduces a fast, high-quality snapshot coherent diffraction imaging method using Babinet illumination and digital micromirror devices. The novel approach overcomes limitations of traditional methods, enabling instant imaging without mechanical parts.

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Area of Science:

Optics and Photonics
Image Reconstruction
Diffraction Imaging

Background:

Single-shot coherent diffraction imaging (CDI) traditionally faces challenges with limited information, slow reconstruction, and poor quality.
Existing CDI methods often rely on multiple prior constraints or mechanical movements, hindering speed and efficiency.

Purpose of the Study:

To develop a rapid, high-quality single-shot coherent diffraction imaging technique.
To overcome the information limitations and reconstruction challenges inherent in traditional CDI.

Main Methods:

Proposed a snapshot method utilizing Babinet illumination and digital micromirror devices (DMDs) for instant modulation.
Employed an optimized phase retrieval algorithm with a complex gradient sparsity prior.
Utilized the alternating direction method of multipliers (ADMM) for iterative optimization.

Main Results:

Demonstrated instant imaging capability by leveraging the fast modulation of DMDs.
Achieved high-quality reconstruction results surpassing conventional methods.
Verified the effectiveness and speed of the proposed Babinet illumination CDI method through experiments.

Conclusions:

The proposed Babinet illumination method offers a significant advancement in single-shot coherent diffraction imaging.
This technique enables fast and high-quality imaging, addressing key limitations of prior CDI approaches.
The integration of DMDs and advanced reconstruction algorithms provides a robust solution for instantaneous diffraction imaging.