The beam diameter or beam width of an electromagnetic beam is the diameter along any specified line that is perpendicular to the beam axis and intersects...

electromagnetics, especially in optics, beam divergence is an angular measure of the increase in beam diameter or radius with distance from the optical...

{\displaystyle 1/e^{2}} measure of the beam diameter for a beam propagating in free space. The mode field diameter is defined as twice the mode field radius...

measurements can be taken with a laser beam profiler. The multiple measurements ensure that the minimum beam diameter is found and enable a "curve fit" that...

lasers Beam diameter Collimated beam Crepuscular rays Light pillar, atmospheric optical phenomena Pencil beam Ray (optics) Relativistic beaming A short...

shape to the beam, a beam homogenizer spreads out the central concentrated energy of the beam among the entire beam diameter. A simple beam homogenizer...

total power of the beam, A = π D 2 / 4 {\displaystyle A=\pi D^{2}/4} is the area of the beam ( D {\displaystyle D} is the beam diameter), λ {\displaystyle...

beam) laser eventually diverges at an angle that varies inversely with the beam diameter, as required by diffraction theory. Thus, the "pencil beam"...

overfill is the condition that prevails when the numerical aperture or the beam diameter of an optical source, such as a laser, light-emitting diode, or optical...

to optical damage. Thus, high-power DPSSLs generally have a larger beam diameter, as the 1064 nm laser is expanded before it reaches the KTP crystal...

known as the beam propagation ratio or beam quality factor is a measure of laser beam quality. It represents the degree of variation of a beam from an ideal...

energy levels could reach 100 kW or more and the system could focus a beam to the diameter of a coin at a distance of 10 km (6.2 mi). The main benefits of using...

high and a low beam light distribution. In 1957, a system of four sealed-beam headlamps—two per side, of 5+3/4 inches (146 mm) diameter, was allowed in...

divergence of high-quality laser beams is commonly less than 1 milliradian (3.4 arcmin), and can be much less for large-diameter beams. Laser diodes emit less-collimated...

lens is focusing a beam of light with a finite extent (e.g., a laser beam), the value of D corresponds to the diameter of the light beam, not the lens. Since...

beam diameter to the focal distance becomes larger, parabolic reflectors can be made to accommodate beams of any width. However, if the incoming beam...

In optics, a Gaussian beam is an idealized beam of electromagnetic radiation whose amplitude envelope in the transverse plane is given by a Gaussian function;...

a lens allows profiling of larger-diameter beams. Viewing lasers off diffuse surfaces is excellent for large beam widths but requires a diffuse surface...

following table lists the kinetic diameters of some common molecules; Collisions between two dissimilar particles occur when a beam of fast particles is fired...

machine eventually achieved a maximum beam energy of 350 MeV for protons. However, synchrocyclotrons suffer from low beam intensities (< 1 μA), and must be...

of cavity produces a diffraction-limited beam waist in the centre of the cavity, with large beam diameters at the mirrors, filling the whole mirror aperture...

titanium-sapphire laser beam passing through an iris diaphragm, while opening and closing the iris. Note changes in beam diameter observed on the downstream...

resulting beam has a larger diameter, and hence a lower divergence. Divergence of a laser beam may be reduced below the diffraction of a Gaussian beam or even...

terms for similar items include H-beam, I-profile, universal column (UC), w-beam (for "wide flange"), universal beam (UB), rolled steel joist (RSJ), or...

the x or y direction (see Beam diameter § D4σ or second-moment width), and z 0 {\displaystyle z_{0}} is the location of the beam waist with second moment...

in a single Porro prism the beam is typically deviated by 180° and displaced by a distance of at least one beam diameter. Porro prisms can reflect light...

diameter with 6-foot (1.8 m) stroke and one 27-inch (0.69 m) diameter with 8-foot (2.4 m) stroke – placed alongside each other at one end of the beam...

body or running clearance, or installing larger diameter tires to increase ground/axle clearance. A beam axle does not allow each wheel to move independently...

such as microscopes and telescopes. Class 1M lasers produce large-diameter beams, or beams that are divergent. The MPE for a Class 1M laser cannot normally...

to a confocal one means to be close to instability, which means the beam diameter is sensitive to cavity changes. This emphasizes the modulation. With...