A laser beam is shone onto a ball bearing and a bright spot appears at the centre of the object’s shadow due to Fresnel diffraction ... the slide mount on the optical rail and insert the sample slide ...

Recent research has focused on various types of DOEs, including Fresnel lenses, diffraction gratings, and specialized designs like the lobster eye telescope, which are tailored for specific ...

Fresnel diffraction, however ... the soil makeup of an entire area without hand-digging a space for each sample area. This is ...