Structured light dark-field microscope

TL;DR

This paper introduces a structured light dark-field microscope that enhances resolution and contrast using phase-shifted fringes, demonstrating improved imaging of biological tissues with potential biomedical and defect detection applications.

Contribution

It presents a novel structured light illumination technique for dark-field microscopy that enhances resolution and contrast in both transmission and reflectance modes.

Findings

Improved resolution and contrast in dark-field images.

Successful imaging of human tissue samples.

Versatile implementation in different imaging modes.

Abstract

A resolution-enhanced dark-field microscope by structured light illumination is proposed to improve resolution and contrast. A set of phase-shifted fringes are projected to the sample plane at large angle to capture modulated dark-field images, from which resolution- and contrast-enhanced dark-field image, as well as sectioned dark-field image, can be obtained. Human tissue samples are tested to demonstrate the resolution and contrast enhancement. The system can be implemented in transmission-mode and reflectance-mode, with potential applications ranging from defect detection to biomedical imaging.