optics$55396$ - definizione. Che cos'è optics$55396$
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Cosa (chi) è optics$55396$ - definizione

ELECTRON TRAJECTORIES IN ELECTROMAGNETIC FIELDS
Electron Optics; Beam optics
  • Magnetic lens

electron optics         
¦ plural noun [treated as sing.] the branch of physics concerned with the behaviour of electrons in magnetic and electric fields.
Electron optics         
Electron optics is a mathematical framework for the calculation of electron trajectories along electromagnetic fields. The term optics is used because magnetic and electrostatic lenses act upon a charged particle beam similarly to optical lenses upon a light beam.
Geometrical optics         
  • Incoming parallel rays are focused by a convex lens into an inverted real image one focal length from the lens, on the far side of the lens
  • With concave lenses, incoming parallel rays diverge after going through the lens, in such a way that they seem to have originated at an upright virtual image one focal length from the lens, on the same side of the lens that the parallel rays are approaching on.
  • Rays from an object at finite distance are associated with a virtual image that is closer to the lens than the focal length, and on the same side of the lens as the object.
MODEL OF OPTICS DESCRIBING LIGHT AS GEOMETRIC RAYS
Geometric optics; Ray optics; Geometric Optics; Sommerfeld–Runge method; Sommerfeld-Runge method
Geometrical optics, or ray optics, is a model of optics that describes light propagation in terms of rays. The ray in geometric optics is an abstraction useful for approximating the paths along which light propagates under certain circumstances.

Wikipedia

Electron optics

Electron optics is a mathematical framework for the calculation of electron trajectories along electromagnetic fields. The term optics is used because magnetic and electrostatic lenses act upon a charged particle beam similarly to optical lenses upon a light beam.

Electron optics calculations are crucial for the design of electron microscopes and particle accelerators. In the paraxial approximation, trajectory calculations can be carried out using ray transfer matrix analysis.