High-resolution three-dimensional partially coherent diffraction imaging.

Area of Science:

• Optics and Photonics
• Materials Science
• Computational Imaging

Background:

• Coherent diffractive imaging (CDI) utilizes light coherence for high-resolution imaging.
• Partial coherence in illumination degrades CDI reconstruction quality, causing artifacts or failure.
• Accurate characterization of wavefield coherence is crucial for advanced imaging.

Purpose of the Study:

• To develop a method for ab initio phasing of partially coherent diffraction patterns in three dimensions.
• To simultaneously determine the coherence properties of the illuminating wavefield.
• To improve image interpretability and enable quantitative imaging of nanostructures.

Main Methods:

• Demonstration of 3D ab initio phasing for partially coherent diffraction data.
• Simultaneous retrieval of object information and wavefield coherence properties.
• Application to X-ray and electron imaging modalities.

Main Results:

• Successful 3D reconstructions from partially coherent diffraction patterns.
• Accurate determination of the coherence properties of the illuminating wavefield.
• Significant improvements in image interpretability and reduction of artifacts.

Conclusions:

• The developed method enables robust 3D quantitative imaging with partially coherent light.
• Simultaneous coherence evaluation provides critical information for wavefield characterization.
• Broad implications for nanostructure imaging and advanced microscopy techniques.