Try Our Apps
Dictionary.com

follow Dictionary.com

Words You've Been Using Wrong

Fresnel lens

noun
1.
Optics. a large lens with a surface of concentric grooves of prismatic profile, used in automobile headlights, searchlights, spotlights, etc.
Origin of Fresnel lens
1840-1850
First recorded in 1840-50; See origin at fresnel
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for Fresnel lens
Historical Examples
British Dictionary definitions for Fresnel lens

Fresnel lens

noun
1.
a lens consisting of a number of smaller lenses arranged to give a flat surface of short focal length
Word Origin
C20: named after Augustin Jean Fresnel (1788–1827), French physicist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Fresnel lens in Science
Fresnel lens
  (frə-něl')   
A thin optical lens consisting of concentric rings of segmental lenses and having a short focal length. Placing a light source at the focal point of the lens gives rise to a strong beam of nearly parallel rays. Fresnel lenses are used primarily in spotlights, lighthouses, and the headlights of motor vehicles.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for fresnel lens

Word Value for Fresnel

10
12
Scrabble Words With Friends