A team of researchers have been working on a handheld camera that sports the technology that can see through the wall using micro wave, additionally future usage envisioned is for cancer detection and aerospace engineering.
The camera currently takes 30 images per second by transmitting millimeter and microwaves to a “collector” on the other side of a subject, and then sends them to a laptop for real-time inspection. Aside from being able to see straight through your BVDs, it can also be used to detect defects in spacecraft insulation, find termites lurking in the walls of your apartment, and help in the diagnosis of skin disease.
A microwave camera is sort of like a cross between a visible light camera and a radar imaging system, incorporating some of the advantages of each. Like radar, microwaves don’t really notice things like darkness or fog or walls, but unlike radar they’re not confused by the kinds of angled surfaces that make the stealth fighter so stealthy. Radar systems also tend to be big, complex, low resolution, and expensive. By taking a more camera-like approach to radio frequency imaging, essentially treating microwaves like waves of light and using a passive reflector like a lens, MIT has been able to leverage computational-imaging techniques to develop a low cost, high resolution imaging system.
MIT’s microwave camera can do 3-D imaging using time of flight, in the same way that Microsoft’s latest Xbox Kinect sensor works. The time of flight camera sends out bursts of microwaves and then keeps careful track of how long it takes for the microwaves to bounce off of something and return to the sensor. After doing some not very fancy math with the speed of light, you can then calculate how far away that something is. MIT’s camera has a temporal resolution of 200 picoseconds, allowing it to resolve distances with an accuracy of 6 cm, enough for usable 3-D imaging.
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