This meant that a microscope could not resolve two objects located closer than λ/2NA, where λ is the wavelength of light and NA is the numerical aperture of the imaging lens. This diffraction ...

Scientists have developed an impossibly thin telescope lens that addresses a key astronomical challenge in a new study funded ...

A laser beam hits a meta-grating that directs the light waves even at steep incidence angles, thus enabling new optical ...

What is the Diffraction Limit? The diffraction limit is a fundamental barrier in optical microscopy that sets the minimum size of features that can be resolved using conventional light microscopes. It ...

The waves always 'spread' to some extent into the area beyond the gap. This is diffraction - the spreading out of waves when they go through a gap, or past the edge of a barrier. The extent of the ...

However, traditional dark-field microscopy is limited by the diffraction barrier and often ... upright microscope with a X40 objective lens (NA 0.6) and a coherent laser source coupled into ...