Hugh Pickens writes: "Researchers at MIT have developed a laser camera that can "see" around corners and take pictures of a scene not in its direct line of sight. The camera system fires extremely short bursts of light that can reflect off one object, such as the open door of a room, and then off a second object inside the room before reflecting back to the first object and being captured by the camera, after which algorithms can use the information to reconstruct the hidden scene exploiting the fact that it is possible to capture light at extremely short time scales, about one quadrillionth of a second. By continuously gathering light and computing the time and distance that each pixel has traveled, the camera creates a "3D time-image" of the scene it can't directly see. "It's like having X-ray vision without the X-rays," says Professor Ramesh Raskar. "We're going around the problem rather than going through it.""
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