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 ...

A laser beam is shone onto a variable rectangular aperture. The size of the hole determines the type of diffraction produces on the screen. Very small apertures produce Fraunhofer diffraction, and ...

Of course, as in any system in which an electromagnetic wave encounters an aperture, diffraction will occur. The result is that, in the far field of the aperture, one can expect to see fringes, rings, ...

One of these apertures will determine the diameter of the cone of energy which the system will accept from an axial point on the object. This is termed the aperture stop, and its size determines the ...

A He-Ne laser shines on a variety of aperture patterns to create interference fringes. Most of the aperture patterns are single- and double-slits. These are also the most-used. Mount the laser and ...

Captured here is a laser diffraction pattern, visible as a series of concentric circles with a bright central area. This pattern is a result of light waves spreading out and overlapping after passing ...

The key principles behind electron diffraction are: SAED is a technique used in transmission electron microscopy (TEM) to obtain diffraction patterns from specific regions of a sample. A selected area ...

Learn about the diffraction limit in microscopy and how super-resolution microscopy revolutionized the field, earning its ...