Dictionary - Definition of Fresnel


Part of Speech	Definition
Noun	1. French physicist who invented polarized light and invented the Fresnel lens (1788-1827).[Wordnet].
Source: WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.		Top

"Fresnel" is a common misspelling or typo for: fresher, fennel, freshen, Fresno, freshet, crenel.

Date "Fresnel" was first used in popular English literature: sometime before 1827. (references)

Common Expressions: Fresnel

Expressions	Definition
Augustin Jean Fresnel	French physicist who invented polarized light and invented the Fresnel lens (1788-1827). Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved.
Fresnel diffraction	Fresnel diffraction is the diffraction pattern obtained a small number of wavelengths away from the diffracting object. (references)
Fresnel drag coefficient	Where n is the refractive index of the body. (references)
Fresnel lamp	Alt. of Fres'nel' lan'tern. Source: Webster's Revised Unabridged Dictionary.
Fresnel lens	1: See under Lens. Source: Webster's Revised Unabridged Dictionary.
	2: (Opt.), a compound lens formed by placing around a central convex lens rings of glass so curved as to have the same focus; used, especially in lighthouses, for concentrating light in a particular direction; -- so called from the inventor. Source: Webster's Revised Unabridged Dictionary.
	3: Lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved.
Source: compiled by the editor from various references; see credits.		Top

Specialty Expressions: Fresnel

Expressions	Domain	Definition
Fresnel diffraction pattern	Business	Synonym near-field diffraction pattern. (references)
Fresnel lens	Business	A relatively thin lens consisting of a series of concentric stepped rings, each one being a section of a curved surface. The combined effect of all the rings is the same as that of a simple lens with the same diameter and curvature. (references)
Fresnel lens	Energy	An optical device for concentrating light that is made of concentric rings that are faced at different angles so that light falling on any ring is focused to the same point. (references)
Fresnel lens	Military	A type of optic consisting of a convex lens and many prisms of glass which focus and intensify the light through reflection and refraction. (references)
Fresnel reflection	Business	In optics, the reflection of a portion of incident light at a discrete interface between two media having different refractive indices. Note 1: Fresnel reflection occurs at the air-glass interfaces at the entrance and exit ends of an optical fiber. Resultant transmission losses, on the order of 4% per interface, can be reduced considerably by the use of index-matching materials. Note 2: The coefficient of reflection depends upon the refractive index difference, the angle of incidence, and the polarization of the incident radiation. For a normal ray, the fraction of reflected incident power is given by R = (n - n)/(n + n), where R is the reflection coefficient and n and n are the respective refractive indices of the two media. In general, the greater the angle of incidence with respect to the normal, the greater the Fresnel reflection coefficient, but for radiation that is linearly polarized in the plane of incidence, there is zero reflection at Brewster's angle. Note 3: Macroscopic optical elements may be given antireflection coatings consisting of one or more dielectric thin-film layers having specific refractive indices and thicknesses. Antireflection coatings reduce overall Fresnel reflection by mutual interference of individual Fresnel reflections at the boundaries of the individual layers. (references)
Fresnel reflection	Weather	The reflection of a radar signal from a single, dominating discontinuity of the refractive index, usually with a large horizontal extent. Also called "partial reflection" because only a small fraction of the incident power is reflected, "specular reflection" if the horizontal surface discontinuity is assumed to be smooth, or "diffuse reflection" if the discontinuity is assumed to be corrugated or somewhat rough. (references)
Fresnel region	Aerospace	The region between the antenna and the Fraunhofer region. If the antenna has a well-defined aperture a in a given aspect, the Fresnel region is that aspect is commonly taken to extend a distance 2aa / in that aspect, being the wavelength. (references)
Fresnel scatter	Weather	Scatter which occurs if several or many refractive index discontinuities exist along the pointing direction. The difference between Fresnel reflection and scatter may be primarily a matter of resolution of the sampling volume compared to the size of the reflecting target. (references)
Fresnel zone	Aerospace	Any one of the array of concentric surfaces in space between transmitter and receiver (or between radar antenna and target) over which the increase in distance over the straight line path is equal to some multiple of one-half wavelength. Also called half-period zone. See interference region. Outside of rather unusual multipath transmission of radio energy in the free atmosphere, Fresnel zones are of importance primarily in studying the interference lobes produced by the interaction of a direct and a surface-reflected wave. Thus, for a given path, reflected radio energy arriving at the receiver from any point along any of the surface Fresnel zones will be some multiple of 180 out of phase with the direct wave, thereby producing destructive or constructive interference as the multiple is odd or even, respectively. (references)
Fresnel zone	Business	In radio communications, one of a (theoretically infinite) number of a concentric ellipsoids of revolution which define volumes in the radiation pattern of a (usually) circular aperture. Note 1: The cross section of the first Fresnel zone is circular. Subsequent Fresnel zones are annular in cross section, and concentric with the first. Note 2: Odd-numbered Fresnel zones have relatively intense field strengths, whereas even numbered Fresnel zones are nulls. Note 3: Fresnel zones result from diffraction by the circular aperture. (references)
Source: compiled by the editor from various references; see credits.			Top

Topics by Level of Interest: Fresnel
Topics sorted by level of Interest	Level (1=low, 600=high)	Topics sorted Alphabetically	Level (1=low, 600=high)
Fresnel lens	23	Augustin-Jean Fresnel	9
Fresnel diffraction	15	Fresnel (alternative meanings)	3
Fresnel integral	13	Fresnel (unit of frequency)	2
Fresnel equations	11	Fresnel diffraction	15
Fresnel zone	10	Fresnel equations	11
Fresnel lantern	10	Fresnel integral	13
Augustin-Jean Fresnel	9	Fresnel lantern	10
Fresnel rhomb	4	Fresnel lens	23
Hyperradiant Fresnel lens	4	Fresnel number	3
Rimae Fresnel	4	Fresnel rhomb	4
Fresnel number	3	Fresnel zone	10
Fresnel (alternative meanings)	3	Hyperradiant Fresnel lens	4
Fresnel (unit of frequency)	2	Rimae Fresnel	4
Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses).

Language	Translations (or nearest inflections or synonyms, in parentheses)
Bohemian	Fresnelova oblast (fresnel region). Additional references: Bohemian, Czech Republic, fresnel. (volunteer & more translations)
Brazilian Portuguese	fresnel (fresnel). Additional references: Brazilian Portuguese, Portugal, Angola, fresnel. (volunteer & more translations)
Catalan	Augustin Jean Fresnel (Augustin-Jean Fresnel), Clotoide (Fresnel integral). Additional references: Catalan, Spain, Andorra, fresnel. (volunteer & more translations)
Central Danish	Fresnel-linse (fresnel lens, stepped lens), fresnellinse (fresnel lens, stepped lens), aftrappet linse (fresnel lens, stepped lens). Additional references: Central Danish, Denmark, Germany, fresnel. (volunteer & more translations)
Cestina	Fresnelova oblast (fresnel region). Additional references: Cestina, Czech Republic, fresnel. (volunteer & more translations)
Czech	Fresnelova oblast (fresnel region). Additional references: Czech, Czech Republic, fresnel. (volunteer & more translations)
Danish	Fresnel-linse (fresnel lens, stepped lens), fresnellinse (fresnel lens, stepped lens), aftrappet linse (fresnel lens, stepped lens). Additional references: Danish, Denmark, Germany, fresnel. (volunteer & more translations)
Dansk	Fresnel-linse (fresnel lens, stepped lens), fresnellinse (fresnel lens, stepped lens), aftrappet linse (fresnel lens, stepped lens). Additional references: Dansk, Denmark, Germany, fresnel. (volunteer & more translations)
Deutsch	Stufenlinse nach Fresnel (fresnel, Fresnel lens), Fresnelsche Zonenplatte (fresnel zone plate), Fresnelsche Reflexionsmethode (fresnel reflection method), Fresnelscher Reflexionsfaktor (fresnel reflection factor), die Stufenlinse (Fresnel lens), Nahfeldbeugungsmuster (fresnel diffraction pattern), Fresnelzone (Fresnel zone), Fresnellinse (Fresnel lens), Klotoide (Fresnel integral). Additional references: Deutsch, Germany, Austria, fresnel. (volunteer & more translations)
Dutch	Fresnellens (fresnel lens, stepped lens), Augustin-Jean Fresnel (Augustin-Jean Fresnel), traplens (fresnel lens, stepped lens), ringenlens (fresnel lens, stepped lens), trappenlens (fresnel lens, stepped lens). Additional references: Dutch, Netherlands, Aruba, fresnel. (volunteer & more translations)
Finnish	Fresnelin linssi (fresnel lens, stepped lens). Additional references: Finnish, Finland, Russia (Europe), fresnel. (volunteer & more translations)
Français	région de Fresnel (fresnel region), ellipsoïde de Fresnel (fresnel ellipsoid), diagramme de diffraction de Fresnel (fresnel diffraction pattern), réflexion de Fresnel (fresnel reflection), zone de Fresnel (fresnel zone), projecteur à lentille de Fresnel (fresnel spotlight), antenne à lentille de Fresnel (fresnel lens antenna), facteur de réflexion de Fresnel horizontal (horizontal polarization fresnel reflection factor), facteur de réflexion de Fresnel vertical (vertical polarization fresnel reflection factor), hologramme de Fresnel (fresnel hologram). Additional references: Français, France, Algeria, fresnel. (volunteer & more translations)
French	région de Fresnel (fresnel region), ellipsoïde de Fresnel (fresnel ellipsoid), diagramme de diffraction de Fresnel (fresnel diffraction pattern), réflexion de Fresnel (fresnel reflection), zone de Fresnel (fresnel zone), projecteur à lentille de Fresnel (fresnel spotlight), antenne à lentille de Fresnel (fresnel lens antenna), facteur de réflexion de Fresnel horizontal (horizontal polarization fresnel reflection factor), facteur de réflexion de Fresnel vertical (vertical polarization fresnel reflection factor), hologramme de Fresnel (fresnel hologram). Additional references: French, France, Algeria, fresnel. (volunteer & more translations)
German	Stufenlinse nach Fresnel (fresnel, Fresnel lens), Fresnelsche Zonenplatte (fresnel zone plate), Fresnelsche Reflexionsmethode (fresnel reflection method), Fresnelscher Reflexionsfaktor (fresnel reflection factor), die Stufenlinse (Fresnel lens), Nahfeldbeugungsmuster (fresnel diffraction pattern), Fresnelzone (Fresnel zone), Fresnellinse (Fresnel lens), Klotoide (Fresnel integral). Additional references: German, Germany, Austria, fresnel. (volunteer & more translations)
Greek	κλιμακωτός φακός (fresnel lens, stepped lens), φακός του Fresnel (fresnel lens, stepped lens), φακός Fresnel (fresnel lens). Additional references: Greek, Greece, Albania, fresnel. (volunteer & more translations)
Greek (transliteration)	klimakotos fakos (fresnel lens, stepped lens), fakos toi fresnel (fresnel lens, stepped lens), fakos fresnel (fresnel lens). Additional references: Greek, Greece, Albania, fresnel. (volunteer & more translations)
High German	Stufenlinse nach Fresnel (fresnel, Fresnel lens), Fresnelsche Zonenplatte (fresnel zone plate), Fresnelsche Reflexionsmethode (fresnel reflection method), Fresnelscher Reflexionsfaktor (fresnel reflection factor), die Stufenlinse (Fresnel lens), Nahfeldbeugungsmuster (fresnel diffraction pattern), Fresnelzone (Fresnel zone), Fresnellinse (Fresnel lens), Klotoide (Fresnel integral). Additional references: High German, Germany, Austria, fresnel. (volunteer & more translations)
Hochdeutsch	Stufenlinse nach Fresnel (fresnel, Fresnel lens), Fresnelsche Zonenplatte (fresnel zone plate), Fresnelsche Reflexionsmethode (fresnel reflection method), Fresnelscher Reflexionsfaktor (fresnel reflection factor), die Stufenlinse (Fresnel lens), Nahfeldbeugungsmuster (fresnel diffraction pattern), Fresnelzone (Fresnel zone), Fresnellinse (Fresnel lens), Klotoide (Fresnel integral). Additional references: Hochdeutsch, Germany, Austria, fresnel. (volunteer & more translations)
Portuguese	fresnel (fresnel), zona de fresnel (fresnel zone), região de fresnel (fresnel region), diagrama de fresnel (fresnel pattern), elipsóide de fresnel (fresnel ellipsoid), refletor fresnel (fresnel reflector), lente Fresnel (fresnel lens, stepped lens), lente em escada (fresnel lens, stepped lens), lente de Fresnel (fresnel Len, fresnel lens, stepped lens). Additional references: Portuguese, Portugal, Angola, fresnel. (volunteer & more translations)
Ruotsi	Fresnel-lins (fresnel lens, stepped lens), Klotoid (Fresnel integral), fresnellins (fresnel lens). Additional references: Ruotsi, Sweden, Finland, fresnel. (volunteer & more translations)
Sjaelland	Fresnel-linse (fresnel lens, stepped lens), fresnellinse (fresnel lens, stepped lens), aftrappet linse (fresnel lens, stepped lens). Additional references: Sjaelland, Denmark, Germany, fresnel. (volunteer & more translations)
Spanish	zona de Fresnel (fresnel zone), reflexión de Fresnel (fresnel reflection), región de Fresnel (fresnel region), elipsoide de Fresnel (fresnel ellipsoid), coeficiente de reflexión de Fresnel (fresnel reflection factor), método de reflexión de Fresnel (fresnel reflection method), reflexiones de Fresnel (fresnel reflections), proyector con lente de Fresnel (fresnel spotlight), Lente de Fresnel elíptica (elliptic fresnel lens), diagrama de difracción de Fresnel (fresnel diffraction pattern). Additional references: Spanish, Spain, Mexico, fresnel. (volunteer & more translations)
Suomea	Fresnelin linssi (fresnel lens, stepped lens). Additional references: Suomea, Finland, Russia (Europe), fresnel. (volunteer & more translations)
Suomi	Fresnelin linssi (fresnel lens, stepped lens). Additional references: Suomi, Finland, Russia (Europe), fresnel. (volunteer & more translations)
Svenska	Fresnel-lins (fresnel lens, stepped lens), Klotoid (Fresnel integral), fresnellins (fresnel lens). Additional references: Svenska, Sweden, Finland, fresnel. (volunteer & more translations)
Swedish	Fresnel-lins (fresnel lens, stepped lens), Klotoid (Fresnel integral), fresnellins (fresnel lens). Additional references: Swedish, Sweden, Finland, fresnel. (volunteer & more translations)
Source: Eve, based on a combination of meta analysis and graph theory (for near and back translations).		Top

Language	Translations for “fresnel” or closest synonym(s); back translations in parentheses.
Athag	frathagesnathagel (fresnel). Additional references: Athag, fresnel. (volunteer)
Double Dutch	fragesnagel (fresnel). Additional references: Double Dutch, fresnel. (volunteer)
Leet	\|#\|z£§//£\|_ (fresnel). Additional references: Leet, fresnel. (volunteer)
Oppish	fropesnopel (fresnel). Additional references: Oppish, fresnel. (volunteer)
Pig Latin	esnelfray (fresnel). Additional references: Pig Latin, fresnel. (volunteer)
Terran B	fresneli (fresnel). Additional references: Terran B, fresnel. (volunteer)
Ubbi Dubbi	frubesnubel (fresnel). Additional references: Ubbi Dubbi, fresnel. (volunteer)
Source: compiled by the editor.		Top

Definition: Fresnel

Common Expressions: Fresnel

Specialty Expressions: Fresnel

Topics by Level of Interest: Fresnel

Translations: Fresnel

Constructed Language Translations: Fresnel