Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on ...

Although some lighthouses were already using lenses, they weren’t using the special Fresnel-style lenses. There had been speculation about building this type of lens, but Fresnel was apparently ...

For centuries, lenses have worked the same way: curved glass or plastic bending light to bring images into focus. But traditional lenses have a major drawback—the more powerful they need to be ...

is not perhaps the most efficient lens in terms of light focused per unit area of lens. From dredging up our highschool physics lessons we are guessing that half the light is diffracted outwards ...

Scientists have also tried to solve the bulkiness problem by designing flat lenses, which manipulate light in a different way. One existing type, called a Fresnel zone plate (FZP), uses concentric ...