FODetect from Israel’s Xsight uses hybrid radar and electro optical technology to detect junk on runways. The system can prevent incidents such as when an Air France Concorde hit Foreign Object Debris (FOD) from a previous flight, caught fire and crashed, killing 113 people.
http://www.timesofisrael.com/israeli-system-keeps-runways-clean-and-planes-safe/
http://www.youtube.com/watch?feature=player_embedded&v=eWUim5agoGE