Wide-field, high-resolution Fourier ptychographic microscopy

Area of Science:

• Microscopy
• Optical Imaging
• Computational Imaging

Background:

• Traditional microscopy is limited by physical optics, restricting field-of-view and depth-of-focus.
• Achieving high resolution and wide field-of-view simultaneously presents a significant challenge in microscopy.

Purpose of the Study:

• To introduce Fourier ptychographic microscopy (FPM) as a novel imaging method.
• To demonstrate FPM's capability to produce wide-field, high-resolution complex sample images.
• To showcase FPM's ability to correct optical aberrations and extend depth-of-focus computationally.

Main Methods:

• Iteratively stitching low-resolution intensity images in Fourier space.
• Employing a wavefront correction strategy to compensate for aberrations.
• Developing a microscope prototype for experimental validation.

Main Results:

• Achieved a microscope resolution of 0.78 μm.
• Obtained a field-of-view of approximately 120 mm².
• Demonstrated a resolution-invariant depth-of-focus of 0.3 mm.
• Verified FPM operation with gigapixel color images of histology slides.

Conclusions:

• FPM computationally overcomes the physical limitations of optical systems.
• This imaging technique enables high-throughput, high-resolution microscopy.
• FPM offers a computationally solvable approach to microscopy challenges.