Fresnel lensFres·nel lens
a thin optical lens of many concentric rings, having the properties of a much thicker and heavier lens: used in cameras, lighthouse beacons, etc.
Origin of Fresnel lensafter Fresnel
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.
Origin of Fresnel lensAfterAugustin Jean Fresnel
Prisms that make up a
Fresnel lens bend and
magnify light rays, creating
a single, concentrated beam