Fresnel zone

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• Fresnel zone — In optics and radio communications, a Fresnel zone (pronounced FRA nel Zone ), named for physicist Augustin Jean Fresnel, is one of a (theoretically infinite) number of concentric ellipsoids of revolution which define volumes in the radiation… …   Wikipedia

• Fresnel zone — Frenelio zona statusas T sritis radioelektronika atitikmenys: angl. Fresnel zone; wavezone vok. Wellengebiet, n; Wellenzone, f rus. волновая зона, f; зона Френеля, f pranc. zone de Fresnel, f; zone d onde, f; zone ondulatoire, f …   Radioelektronikos terminų žodynas

• Fresnel zone plate — noun An optical device that uses diffraction through alternate transparent and opaque rings to function as a lens Syn: zone plate …   Wiktionary

• Zone de Fresnel — Cette page est une ébauche de traduction depuis la page anglaise : en:Fresnel zone zone de Fresnel: d est la distance entre l émetteur et le récepteur, b est le rayon de la zone de Fresnel. En optique et radio communications (en effet, dan …   Wikipédia en Français

• Fresnel (disambiguation) — Fresnel can refer to physicist Augustin Jean Fresnel, or to the following topics associated with him:*Fresnel equations, describing light reflection and refraction *Huygens Fresnel principle, a description of wave propagation *Fresnel diffraction …   Wikipedia

• Fresnel diffraction — In optics, the Fresnel diffraction equation for near field diffraction, is an approximation of Kirchhoff Fresnel diffraction that can be applied to the propagation of waves in the near field.[1] The near field can be specified by the Fresnel… …   Wikipedia

• Zone plate — A zone plate is a device used to focus light. Unlike lenses however, zone plates use diffraction instead of refraction. Created by Augustin Jean Fresnel [freɪ nel] , they are sometimes called Fresnel zone plates in his honor. The zone plate s… …   Wikipedia

• Fresnel equations — The Fresnel equations, deduced by Augustin Jean Fresnel (pronEng|freɪˈnɛl), describe the behaviour of light when moving between media of differing refractive indices. The reflection of light that the equations predict is known as Fresnel… …   Wikipedia

• Fresnel integral — S(x) and C(x) The maximum of C(x) is about 0.977451424. If πt²/2 were used instead of t², then the image would be scaled vertically and horizontally (see below). Fresnel integrals, S(x) and C(x), are two transcendental functions named aft …   Wikipedia

• zone de Fresnel — Frenelio zona statusas T sritis radioelektronika atitikmenys: angl. Fresnel zone; wavezone vok. Wellengebiet, n; Wellenzone, f rus. волновая зона, f; зона Френеля, f pranc. zone de Fresnel, f; zone d onde, f; zone ondulatoire, f …   Radioelektronikos terminų žodynas

• Fresnel number — The Fresnel number F , named after the physicist Augustin Jean Fresnel, is a dimensionless number occurring in optics, in particular in diffraction theory.For an electromagnetic wave passing through an aperture and hitting a screen, the Fresnel… …   Wikipedia