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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.]
(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]
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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