Focal-plane detection and object reconstruction in the noninterferometric phase imaging.

Area of Science:

• Optics and Photonics
• Image Processing
• Computational Imaging

Background:

• Non-interferometric phase imaging offers advantages over traditional methods.
• Accurate focal plane detection is crucial for high-quality image reconstruction.
• Existing phase retrieval techniques can be sensitive to aberrations.

Purpose of the Study:

• To develop effective methods for focal plane detection in non-interferometric phase imaging.
• To recover objects with high-quality phase maps.
• To demonstrate the feasibility and effectiveness of the proposed techniques.

Main Methods:

• A strategy employing varying aberration coefficients to record sequential diffraction intensity maps using a charge-coupled device.
• Application of a phase retrieval algorithm for extracting object wavefront from recorded intensity maps.
• Development of numerical methods for precise focal plane detection and subsequent phase map recovery using determined focal distances.

Main Results:

• Successful extraction of object wavefronts from diffraction intensity data.
• Accurate detection of focal planes within the imaging system.
• High-quality phase maps recovered by leveraging the detected focal distances.
• Theoretical validation of the proposed methods' performance.

Conclusions:

• The proposed methods provide an effective solution for focal plane detection and object recovery in non-interferometric phase imaging.
• The developed strategy demonstrates robustness in handling aberrations.
• The technique enables high-fidelity phase map reconstruction, advancing computational imaging capabilities.