November 17, 2010 report
Laser-based camera can see around corners
The laser-based camera system is being designed by MIT Professor Ramesh Raskar and others. They call the system a "femtosecond transient imaging system," and explain that it exploits 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.
"Its like having x-ray vision without the x-rays," Raskar said. "Were going around the problem rather than going through it."
The researchers are still in the early stages of development and are working on accurately mapping more complex scenes. They predict that the system could have a variety of applications. For instance, it could be used for search and rescue missions to search for survivors in a collapsed building or a building on fire. It could also be used for avoiding car collisions at blind corners, for machine vision, and for inspecting industrial objects with hidden surfaces. It could have similar biomedical imaging applications by allowing doctors to use endoscopes to view areas inside the body that are normally hidden. The researchers noted that a portable imaging system in the form of an endoscope could be ready in the next two years.
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