Try on an Oculus Rift or HTC Vive and one of the first things you’ll probably notice looking through the lenses are fine concentric circles, creating something many call ‘God Rays’—especially ...

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 ...

Nearly two years ago, Wearality created a unique Fresnel lens for VR headsets offering a claimed 150 degree field of view. The company successfully funded a VR viewer featuring the lens called ...

Augustin Fresnel est né en Normandie, dans l’Eure, à Broglie précisément ? Vrai. Augustin Fresnel est né le 10 mai 1788 dans le petit village de Broglie. Son père, Jacques, architecte, travaillait au ...

When Röntgen discovered X-rays in 1895, he immediately searched for a means to focus them 4,5. On the basis of uncertain observations of slight refraction in prisms, he stated that the index of ...

The Office of Naval Research funded the development of a simple array of six lights outfitted with Fresnel lenses mounted on the stern of a ship, called a Tactical Vectoring Equipment (TVE) display.

You may know them best for their original use in lighthouses, where they're famously recognised as "the invention that saved a million ships". Or perhaps you initially think of their employment in ...