GRAND MARAIS, MI – The iconic Fresnel lens is finally visible at this lighthouse in Michigan’s Upper Peninsula, officials announced. After years behind curtains, the 3rd order Fresnel lens atop the Au ...

A piece of Kewaunee's history will now be accessible to everyone. On Thursday, the Kewaunee Pierhead Lighthouse Fresnel Lens was removed and taken to the Kewaunee County Historical Center. “We are ...

Fresnel lenses consist of interspaced, concentric steps which correspond to the surface of a conventional lens. This equates to a lens with a common focal length, equivalent to a simple lens, but at ...

If you had an array of high power addressable LEDs, how would you project them onto a wall? Perhaps you’d use a Fresnel lens, or maybe an individual lens on the top of each. [Joo] faced this problem ...

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 ...

Your support goes further this holiday season. When you buy an annual membership or give a one-time contribution, we’ll give a membership to someone who can’t afford access. It’s a simple way for you ...