MIT camera uses lasers to capture images from around corners | VIDEO

It fires these lasers at a wall, which bounces them into a room. The beams then reflect off objects and people before re-emerging and striking a detector. The detector takes measurements every few picoseconds, or trillionths of a second.

The camera does this several times, bouncing light off several different spots on the wall to cover several angles.

The system then compares the time at which each light beam returns to the detector (and their angle), to piece together a picture of the room’s geometry. It’s a bit like ultrasound, or the way Microsoft’s Kinect uses a bunch of infrared dots to determine 3D shapes.

By Mark Brown

A 3-D solid model of a jack inside a cube. Mod...

Researchers at the Massachusetts Institute of Technology have built a camera that can see around corners, by bouncing bursts of laser light off doors or walls.

The system works like a periscope. But instead of mirrors, it uses ordinary walls, doors or floors; instead of light, the camera is equipped with a femtosecond laser that emits bursts of light so short that their duration is measured in

quadrillionths of a second.