Seeking to improve the visibility and reach of lighthouse beams, French physicist and civil engineer Augustin-Jean Fresnel developed a new type of lens in the early 19th century that used both ...

Long before GPS, lighthouses had been guiding sailors home for centuries. Their rotating lights use certain patterns to help ...

The popular French lens design was originally created for lighthouses The popular French lens design was originally created for lighthouses is a senior editor and founding member of The Verge who ...

The most important thing to know about Fresnel lenses, before casually attempting to drop them into conversation, has to do with phonetics: "Fresnel" is pronounced "Fruh-NEL." If the silent "S" makes ...

Almost 90 years after it was first installed in the historic Point Cabrillo Lighthouse, the 1937 motor that has long helped guide mariners through the night along the Mendocino Coast is back in ...

If you are a Hackaday reader, you probably know what a Fresnel lens is. You find them in everything from overhead projectors to VR headsets. While it seems commonplace now, the Fresnel lens was an ...

LAKE COUNTY, Minn. — A full-sized replica of Split Rock Lighthouse's third-order Fresnel lens — like the one that occasionally casts its beam out over Lake Superior — is among the highlights of the ...

PORT TOWNSEND — Point Wilson Lighthouse is lit once again with its original 1879 Fresnel lens. Out of commission for decades, the historic lens was relit on Oct. 29. “Relighting this historic optic is ...

A lens manufactured in France in 1902 is shining high atop Montauk Point Lighthouse once again. Earlier this month the U.S. Coast Guard relit the clamshell-shaped Fresnel lens, which guided mariners ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. In the early nineteenth century, ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. In the early nineteenth century, ...