X-ray ghost imaging with a specially developed beam splitter

Area of Science:

• Physics
• Optics
• Materials Science

Background:

• X-ray ghost imaging offers high efficiency through simultaneous object and reference beam signal acquisition.
• Achieving beam splitting with a large field of view, uniform distribution, and high correlation has been a significant challenge.

Purpose of the Study:

• To develop a dedicated crystal beam splitter for overcoming limitations in X-ray ghost imaging.
• To optimize optical layout and Laue crystal fabrication for enhanced beam splitting properties.

Main Methods:

• Optimized synchrotron radiation beamline optical layout and Laue crystal fabrication process.
• Utilized a copper foam modulator to enhance speckle field correlation.
• Employed synthetic aperture X-ray ghost imaging (SAXGI) for image reconstruction.

Main Results:

• Achieved a large field of view, consistent size, uniform intensity distribution, and high correlation for split beams.
• Obtained 92% correlation between object and reference speckle fields and a Glauber function of 1.25.
• Successfully imaged an 880 × 330 pixel circuit board with high fidelity using SAXGI.
• Reconstructed the circuit board's skeleton structure with only 1% sampling rate in SAXGI.

Conclusions:

• The developed crystal beam splitter is effective for efficient X-ray ghost imaging.
• The beam splitter enables high-fidelity imaging and detailed structural determination even with sparse data.