On-chip lensless polarization microscope with multiplexed illumination using LED array

Area of Science:

• Optics and Photonics
• Biomedical Imaging
• Microscopy

Background:

• Conventional polarized lensless microscopy requires bulky, complex stages for sensor movement.
• Existing methods necessitate image registration, increasing acquisition time and system complexity.
• There is a need for compact, cost-effective lensless imaging solutions with high resolution and large fields of view.

Purpose of the Study:

• To develop a novel polarized lensless microscope design.
• To achieve high-resolution, wide field-of-view (FOV) imaging without mechanical sensor movement.
• To enhance the applicability of lensless imaging in the biomedical field.

Main Methods:

• Implemented a polarized lensless microscope utilizing illumination diversity.
• Integrated a two-LED multiplexed pixel super-resolution and multi-wavelength phase retrieval framework.
• Employed an RGB-LED matrix and illumination polarization-state modulation for advanced imaging capabilities.

Main Results:

• Achieved sub-micron resolution across a wide FOV.
• Demonstrated a compact and cost-effective system design.
• Enabled rapid image acquisition and reconstruction without mechanical movement.

Conclusions:

• The proposed polarized lensless microscope offers a significant advancement over conventional designs.
• The system's compact nature and rapid acquisition make it suitable for diverse biomedical applications.
• This technology has the potential to broaden the use of lensless imaging in diagnostics and research.