  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.
