411 REFERENCE · Wiktionary
Fresnel lens
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
thumb|Cross-section of a Fresnel lens (left).
Etymology
en Augustin-Jean Fresnel physicist and inventor French.
Noun
The hollow cylindrical lens used in the Fresnel lantern.
en echelon lens
Translations
lens used in Fresnel lantern
Japanese: ja フレネルレンズ Fureneru renzu