Making a traditional glass lens requires a lot of experience, skill, and patience grinding a piece of glass to the required shape, and is not for the casual experimenter. Making a glass Fresnel len… ...

Pancake lenses are compact units that rely on polarization to bounce light around internally, resulting in a very compact assembly at the cost of relatively poor light efficiency.

Fresnel lenses, however, don’t require curvature of any kind, but instead utilize concentric flat rings to diffract light, with the rings’ size and width determining the overall lens focal length.

Astera is set to debut the company’s new QuickPunch, an accurate, fast, and efficient new wireless spotlight with a Fresnel lens that is set to feature a 13º–60º zoom, zero stray light, and ...

So, while we do want a new pancake lens, we also want something that has a brighter aperture. This helps APS-C shooters to get more out of a smaller sensor and makes it easy to shoot in low light ...

Updated: 3:51 PM PST Nov 21, 2017 Editorial Standards ⓘ BIG SUR, Calif. — Point Sur Lightstation is getting its original First-Order Fresnel lens back.

That announcement brings new salience to a Sony patent for "Fresnel lens and manufacturing method for Fresnel lens" (PDF). The patent was first filed in 2017 and issued by the USPTO in May of 2020 ...

The unique history of the Crooked River Lighthouse’s lens in Carrabelle, Florida. The Crooked River Lighthouse’s Executive Director, Steve Allen, shares with us the unique qualities of the ...

A comparison between a Fresnel lens (1) and a traditional lens (2). The Fresnel lens has the same overall curvature but in a more compact package. Fresnel lenses use concentric ridges to condense ...

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 ...

The Fresnel was the original light at Point Sur and was first lit in 1889. The Coast Guard automated the station in the ‘70s and the lens has been living in the museum building for decades.