fresnel number
1Fresnel 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… …
2Fresnel (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 …
3Fresnel 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… …
4Fresnel 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… …
5Fresnel 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… …
6Fresnel , Augustin Jean — (1788–1827) French physicist Fresnel was born in Broglie, France, and grew up in the time of the French Revolution; by the time he was 26, Napoleon had been exiled and Louis XVIII was on the throne. At this time Fresnel was a qualified engineer… …
7Fresnel lens — noun lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length • Hypernyms: ↑lens, ↑lense, ↑lens system • Part Holonyms: ↑headlight, ↑headlamp, ↑searchlight * * * …
8Fresnel, Augustin-Jean — ▪ French physicist born May 10, 1788, Broglie, Fr. died July 14, 1827, Ville d Avray French physicist who pioneered in optics and did much to establish the wave theory of light advanced by Thomas Young. Fresnel served as an engineer in… …
9Fresnel lens — Lens Lens (l[e^]nz), n.; pl. {Lenses} ( [e^]z). [L. lens a lentil. So named from the resemblance in shape of a double convex lens to the seed of a lentil. Cf. {Lentil}.] (Opt.) A piece of glass, or other transparent substance, ground with two… …
10fresnel lens — [freɪ nɛl] noun Photography a flat lens made of a number of concentric rings, to reduce spherical aberration. Origin C19: named after the French physicist and civil engineer Augustin J. Fresnel …
