Fresnel lenses are often used with classic lighthouse lamps due to their ability to diffract light across large distances. [Related: NASA’s next massive telescope could have a liquid lens.] ...

Today, 101 years after the installation of the first modern, three-lens traffic light, yellow is the new green. Red is the new yellow. Green is the new red. It’s all very mystifying.

The 3rd order Fresnel lens in the Au Sable Light Station appears to glow orange in as it refracts the light from the sunrise near Grand Marais, Mich., in Pictured Rocks National Lakeshore.

Visteon has been granted a patent for a light source system for medical or industrial use, featuring LED light sources, Fresnel lenses, and a beam splitter to concentrate and guide light beams ...

The 3rd order Fresnel lens in the Au Sable Light Station appears to glow orange in as it refracts the light from the sunrise near Grand Marais, Mich., in Pictured Rocks National Lakeshore.

The Fresnel lens was made by Sautter & Lemonnier of Paris, France. When it was operational, the light produced a focal plane 58 feet above the mean low water level of the lake.