Copyright © Philip M. Parker, INSEAD. Terms of Use.
Definition: Fresnel Lens |
Fresnel LensNoun1. Lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length. Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved. |
| Domain | Definitions |
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) |
Source: compiled by the editor from various references; see credits. | |
(From Wikipedia, the free Encyclopedia)
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| Lighthouse in Rozewie | (a) Cross section of a Fresnel lens
(b) Cross section of a conventional plano-convex lens of equivalent power |
The Fresnel lens reduces the amount of material required compared to a conventional spherical lens by breaking the lens into a set of concentric annular sections known as Fresnel zones. For each of these zones, the overall thickness of the lens is decreased, effectively chopping the continuous surface of a standard lens into a set of surfaces of the same curvature, with discontinuities between them. This allows a substantial reduction in thickness (and thus weight and volume of material) of the lens, at the expense of reducing the imaging quality of the lens.
For these reasons, Fresnel lenses tend to be used in applications where weight of the lens is at a premium and/or image quality is unimportant. High quality glass Fresnel lenses are used in lighthouses and may include extra annular prismatic elements to improve the brightness of the light beam. Cheap Fresnel lenses can be stamped or moulded out of transparent plastic and are used in overhead projectors and hand magnifiers.
A related optical device is the Fresnel zone plate.
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Fresnel lens."
Crosswords: Fresnel Lens |
| English words defined with "Fresnel lens": Augustin Jean Fresnel ♦ Fresnel, Fres'nel' lan'tern. (references) |
| Specialty definitions using "Fresnel lens": baby solarspot, baby spot, baby spot light. (references) |
| Thumbnail | Description & Credit | Thumbnail | Description & Credit |
 | NURP1 MiniROVer's fresnel lens used for counting particles and plankton. Credit: National Undersea Research Program (NURP). |  | Interpretive center exhibit hall, fresnel lens display. Credit: Aldrich Pears. |
 | Yaquina Head interpretive center display of a fresnel lens. Credit: Aldrich Pears. | ||
Source: pictures compiled by the editor from various references; see picture credits. | |||
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day |
fresnel lens | 162 |
fresnel lens tv | 14 |
6x fresnel lens | 13 |
buy fresnel lens | 7 |
fresnel lens projection tv | 6 |
fresnel lens projector | 5 |
fresnel lens overhead projector | 4 |
800 fresnel lens | 3 |
fresnel lens sale | 2 |
fresnel lens projector tv | 2 |
calmshell fresnel lens | 2 |
fresnel lens small | 2 |
fresnel lens magnifying | 2 |
| Source: compiled by the editor from various references; see credits. | |
| Language | Translations for "Fresnel lens"; alternative meanings/domain in parentheses. | ||||||||||||||||||||||
Danish | Fresnel-linse (stepped lens), fresnellinse (stepped lens), aftrappet linse (stepped lens). (various references) | ||||||||||||||||||||||
Dutch | Fresnel-lens (stepped lens), Fresnellens (stepped lens), trappenlens (stepped lens), traplens (stepped lens), ringenlens (stepped lens). (various references) | ||||||||||||||||||||||
Finnish | Fresnelin linssi (stepped lens). (various references) | ||||||||||||||||||||||
French | lentille Fresnel, lentille de Fresnel, lentille échelons. (various references) | ||||||||||||||||||||||
German | Fresnelsche Stufenlinse (stepped lens), Fresnelsche Linse, Fresnel-Linse (stepped lens), Stufenlinse (prismatic lens, stepped lens, zoned lens), Ringlinse (stepped lens). (various references) | ||||||||||||||||||||||
Greek | κλιμακωτός φακός (stepped lens), φακός του Fresnel (stepped lens), φακός Fresnel, φακóς του Fresnel (stepped lens). (various references) | ||||||||||||||||||||||
Italian | lente rifrangente (stepped lens), lente di Fresnel (stepped lens). (various references) | ||||||||||||||||||||||
Pig Latin | esnelfray enslay lente Fresnel (stepped lens), lente em escada (stepped lens), lente de Fresnel (stepped lens). (various references) lente escalonada (stepped lens, zoned lens), lente de Fresnel (stepped lens). (various references) Fresnel-lins (stepped lens), fresnellins. (various references) | ||||||||||||||||||||||
Scrabble® Enable2K-Verified Anagrams | |
| Words within the letters "e-e-e-f-l-l-n-n-r-s-s" | |
-3 letters: fellness, fernless, flensers, freeness, fresnels. | |
-4 letters: enserfs, feelers, feeless, fellers, fennels, flenser, flenses, fresnel, refeels, resells, sellers, serenes, sneller. | |
-5 letters: enserf, feeler, feller, fennel, fleers, flense, lenses, lessee, lessen, lesser, refeel, refell, refels, reseen, resees, resell, seller, selles, serene, sneers, snells. | |
| Words containing the letters "e-e-e-f-l-l-n-n-r-s-s" | |
+4 letters: crestfallenness. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
Hexadecimal (or equivalents, 770AD-1900s) (references)46 72 65 73 6E 65 6C 4C 65 6E 73 |
| Leonardo da Vinci (1452-1519; backwards) (references)
|
Binary Code (1918-1938, probably earlier) (references)01000110 01110010 01100101 01110011 01101110 01100101 01101100 00100000 01001100 01100101 01101110 01110011 |
HTML Code (1990) (references)F r e s n e l   L e n s |
ISO 10646 (1991-1993) (references)0046 0072 0065 0073 006E 0065 006C 004C 0065 006E 0073 |
Encryption (beginner's substitution cypher): (references)40847185807178246718085 |
| Language | Coverage | Language Translations |
Danish | ordbog, deskriptordefinition, oversættelse | tanskalainen, danois, dänisch, δανικόσ, δανόσ, danese, dinamarquês, danés, dansk |
Dutch | woordenboek, definitie, translatie | hollandsk, hollantilainen, néerlandais, holländisch, ολλανδικόσ, ολλανδόσ, olandese, holandês, holandés, holländsk |
Finnish | määritelmä, translaatio, taajuusmuutos | suomi, suomalainen, finnois, Finlandaise, finlandais, finnisch, φινλανδικόσ, finlandese, finlandês, finês, finlandés, finés, finsk |
French | dictionnaire, définition, traduction | ranskalainen, français, französisch, γαλλικόσ, γαλλική γλώσσα, γαλλίδα, γάλλοσ, francese, francês, francés, fransk, franska |
German | Übersetzung, Wörterbuch, Definition | tysker, Duitse, saksalainen, allemand, "ερμανός, tedesco, alemão, alemán, tysk |
Greek | λεξικό, ορισμός, μετάφραση | græker, kreikkalainen, grec, grieche, ελληνικόσ, 'Ελληνας, greco, grego, griego, grek |
Italian | dizionario, definizione, traduzione | italiener, italialainen, italien, italienisch, Ιταλός, italiano, italiensk, italienska, italienare |
Portuguese | dicionário, definição, tradução | portugiser, portugalilainen, portugais, portugiesisch, πορτογάλοσ, ορτογάλος, portoghese, português, portugués, portugis |
Spanish | diccionario, definición, traducción | Spaans, espanjalainen, espagnol, spanisch, ισπανικά, ισπανικόσ, ισπανοί, spagnolo, espanhol, español, spanska språk, spansk |
Swedish | ordbok, lexikon, översättning | Zweeds, ruotsalainen, suédois, schwedisch, σουηδικόσ, σουηδικά, svedese, sueco, svensk |
English | Dictionary, Definition, Translation | englantia, englantilainen, anglais, englisch, εγγλέζοσ, αγγλικόσ, inglese, inglês, inglés, engelsk |
| 1. Definition 2. Crosswords 3. Images: Slideshow 4. Images: Photo Album | 5. Expressions: Internet 6. Translations: Modern 7. Anagrams 8. Orthography | 9. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
