A team with researchers at the University of Tokyo and JSR Corp. fabricated and tested flat lenses called Fresnel zone plates ... and only a small number of devices are available.

Imagine a world where augmented reality glasses are as lightweight and comfortable as everyday sunglasses, or where ...

"I was too young to really appreciate it," he said. Three years later, the Coast Guard replaced the historic Fresnel lens with a small marine beacon and shut down Pomham Rocks. For Tardiff ...