Copyright: Biblioth猫que de l'Observatoire de Paris / Sylvain Pelly
The first echelon lens designed by Augustin Fresnel and manufactured by optical engineer, Fran莽ois Soleil, was presented to the French Lighthouse Board, which adopted it, noting, 鈥渢he superiority of brightness over parabolic reflectors.鈥� This lens increased the lighting power of lighthouses quite significantly, at a time when maritime traffic was very busy. This type of lens is still used in many lighthouses around the world.