Solid-state far-field macroscopic Fourier ptychographic imaging via programmable illumination with spatial light...

Area of Science:

• Optics and Photonics
• Microscopy Techniques

Background:

• Fourier ptychographic microscopy (FPM) relies on angle-varied illumination.
• Implementing this illumination is challenging for long-distance macroscopic Fourier ptychography (FP).

Purpose of the Study:

• To introduce a novel, flexible, and accurate angle-varied illumination scheme for macroscopic FP at long distances.
• To develop a solid-state macroscopic FP system without bulky scanning mechanisms.

Main Methods:

• Utilized a spatial light modulator to programmatically modulate coherent illumination light.
• Developed a macroscopic FP system integrating the novel illumination with a single camera.
• Employed phase coding to adjust illumination spot size.

Main Results:

• Demonstrated flexible and accurate angle-varied illumination at relatively long distances.
• Eliminated the need for bulky laser scanning mechanisms, improving data collection efficiency.
• Successfully imaged everyday objects and USAF targets at a lab-scale range, confirming the system's effectiveness.

Conclusions:

• The proposed illumination scheme is a novel and effective approach for macroscopic FP.
• The solid-state macro FP system offers advantages in efficiency and flexibility over existing methods.
• The technique is suitable for various macroscopic imaging applications.