Single-shot Fourier ptychography based on diffractive beam splitting.

Area of Science:

• Optics and Photonics
• Microscopy Techniques
• Computational Imaging

Background:

• Fourier ptychography (FP) traditionally requires sequential acquisition of multiple low-resolution images under varying illumination angles.
• This angular scanning process is time-consuming, limiting FP's application in dynamic or high-speed imaging scenarios.
• Developing methods for rapid FP acquisition is crucial for advancing real-time microscopic analysis.

Purpose of the Study:

• To propose and validate a novel single-shot Fourier ptychography (FP) technique.
• To eliminate the need for angular scanning in FP, thereby significantly reducing acquisition time.
• To enable high-speed imaging of object amplitude and phase information.

Main Methods:

• An optical setup employing a Dammann grating was designed to generate multiple angle-varied object waves simultaneously.
• A low-resolution image array, corresponding to different diffraction orders, was recorded in a single exposure.
• A conventional FP reconstruction algorithm was applied to the acquired image array to recover object information.

Main Results:

• The proposed method successfully reconstructed both amplitude and phase information of the object from a single recorded image array.
• Numerical and experimental validations confirmed the feasibility of the single-shot FP approach.
• The elimination of angular scanning dramatically reduced the total data acquisition time.

Conclusions:

• The developed single-shot FP technique offers a significant advancement in imaging speed and efficiency.
• Its fast data acquisition and high temporal resolution make it ideal for applications demanding rapid imaging.
• This method opens new possibilities for real-time observation of dynamic processes in microscopy and other fields.