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Prisms that make up a
Fresnel lens bend and
magnify light rays, creating
a single, concentrated beam
A thin optical lens consisting of concentric rings of segmental lenses and having a short focal length, used primarily in lighthouses, spotlights, overhead projectors, and the headlights of motor vehicles.
[After Augustin Jean Fresnel.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(General Physics) a lens consisting of a number of smaller lenses arranged to give a flat surface of short focal length
[C20: named after Augustin Jean Fresnel (1788–1827), French physicist]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Noun||1.||Fresnel lens - lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length|
headlamp, headlight - a powerful light with reflector; attached to the front of an automobile or locomotive
lens, lens system, lense - a transparent optical device used to converge or diverge transmitted light and to form images
searchlight - a light source with reflectors that projects a beam of light in a particular direction
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.