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 ...

Their popularisation is thanks to French Physicist Augustin-Jean Fresnel, from whom the optic gets its name. In the 1820s, the optics pioneer was working as a commissioner of lighthouses when he ...

In one example, the method was used to design a mobile-phone-sized lens system with a large field of view, featuring lens elements with highly aspheric surfaces and a short back focal length.

Waller won with a $933,888 bid, but the kindred spirits later teamed up to restore the weathered beacon and recently installed a classic Fresnel lens that Waller built piece by piece in his Malden ...

With the possible exception of Fresnel lenses, FDM printing doesn ... a long way to go between a printed blank and a finished lens. That gap is what [Fraens] aims to fill with this homebrew ...

By developing LED lights specifically for integration with a Fresnel lens, Astera aims to provide all of the benefits of LED – including lower power draw, higher output strength, precise colour ...

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 ...