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Fresnel Lens

Fresnel Lens

Close-up of a lighthouse lantern's Fresnel lens. The beehive-like array of lenses and prisms vastly improved the effectiveness of lighthouses in the 19th century.
Galleries: Concentric Shapes, General Navigation Supports, Lenses, Smithsonian Museum of American History
Keywords: american history, america, district of columbia, fresnel, history, lantern, lens, lighthouse, museum, national museum of american history, optics, prism, smithsonian, smithsonian museum of american history, washington dc
Photo Location: National Museum of American History, Washington, DC
Photographer: Dr. Roy Winkelman
Date of Photo: 06/25/2009
Device Make: Canon
Device Model: Canon EOS 5D Mark II
Original Dimensions: 5616×3744
Picture Orientation: Landscape
GPS Coordinates: 38°53'28.53"N 77°1'48.04"W
Picture Number: 748