A lighthouse with the fresnel lens visible inside. Photo by Mark Stebnicki on Pexels.com

Definition

Noun

  • A multiple-facet lens which is used to focus and amplify a light beam.

Origin

Named after its inventor, the French physicist, Augustin Jean Fresnel (1788 – 1827).

Comments

These lenses are commonly used on lighthouses, light buoys, and even a ship’s running lights

References

Rogers, J.G. (1985). Origins of Sea Terms. Mystic Seaport.