Back in 2012 we shared that MIT was developing a special camera that uses echos of light to see around corners. Now, two years later, the researchers are finally showing off the camera in action. It works by firing 50 “femtosecond” (quadrillionth of a second) laser pulses 60 times at various spots at an angled wall. A special imaging sensor then collects the scattered light that’s reflected back and uses complex algorithms to piece together the scene based on how long the photons take to return. The process currently takes several minutes, but researchers hope to reduce it to less than 10 seconds, which would make it more useful for military and industrial applications.
(via Scientific American)