Researchers have demonstrated the first planar lens that works with high efficiency within the visible spectrum of light -- covering the whole range of colors from red to blue. The lens can resolve ...

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, the ...

The Dark Energy Spectroscopic Instrument will begin operation later this year. On April 1 the dome of the Mayall Telescope near Tucson, Arizona, opened to the night sky, and starlight poured through ...