Fresnel lens

Fres·nel lens  (fr-nl) n. A thin optical lens consisting of concentric rings of segmental lenses and having a short focal length, used primarily in spotlights, overhead projectors, and the headlights of motor vehicles. [After Augustin Jean Fresnel.]

Fresnel lens Prisms that make up a Fresnel lens bend and magnify light rays, creating a single, concentrated beam of light.

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Fresnel lens

n

(Physics / General Physics) a lens consisting of a number of smaller lenses arranged to give a flat surface of short focal length

[named after Augustin Jean Fresnel (1788-1827), French physicist]

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Fresnel lens  (fr-nl)

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.

Thesaurus

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