3D-printed compact snap-shot lensless birefringence microscope based on digital on-axis holography.

Area of Science:

• Optics and Photonics
• Materials Science
• Biomedical Imaging

Background:

• Birefringence imaging is crucial for studying anisotropic materials in biology and medicine.
• Existing lens-based techniques for dynamic birefringence imaging are bulky and lab-bound.

Purpose of the Study:

• To develop a compact, stable, and lens-free quantitative birefringence imaging system.
• To enable single-shot, real-time polarization imaging of dynamic samples.

Main Methods:

• A 3D printed, lens-free polarization holographic microscope using digital on-axis holography.
• Integration of a birefringent beam-displacer for spatial multiplexing of polarization holograms.
• Development of a reconstruction algorithm for quantitative birefringence parameter retrieval.

Main Results:

• Simultaneous retrieval of quantitative polarization holographic images and birefringence parameter distributions.
• Demonstrated feasibility and stability of the proposed imaging system.
• High immunity to mechanical vibration and air fluctuations.

Conclusions:

• The 3D printed lens-free microscope provides a robust platform for dynamic birefringence imaging.
• This technology has potential applications in resource-limited environments and for in-situ studies.
• Offers a stable and versatile alternative to traditional bulky birefringence imaging systems.