Three-dimensional phase and intensity reconstruction from coherent modulation imaging measurements.

Area of Science:

• Optics and Photonics
• Image Reconstruction
• Coherent Modulation Imaging

Background:

• Coherent modulation imaging (CMI) is a lensless technique for recovering complex-valued images from diffraction patterns.
• While typically 2D, CMI can be extended to 3D via tomography.
• Existing CMI methods face challenges in phase ambiguity and data preprocessing.

Purpose of the Study:

• To develop a robust 3D reconstruction procedure for CMI.
• To enable quantitative recovery of sample phase and intensity in three dimensions.
• To address pre-processing challenges in CMI data.

Main Methods:

• A novel 3D reconstruction procedure for CMI measurements.
• Pre-processing techniques to remove illumination probe effects, phase ambiguities, and intensity fluctuations.
• Integration with standard tomographic reconstruction frameworks.

Main Results:

• Accurate quantitative 3D phase and intensity images were recovered.
• The method successfully handled illumination probe variations and phase ambiguities.
• Numerical simulations and optical experiments validated the reconstruction accuracy.

Conclusions:

• The presented method enables accurate 3D phase and intensity reconstruction using CMI.
• This advancement extends CMI's applicability to complex 3D imaging scenarios.
• The technique is validated for both simulated and experimental data.