Earlier we have seen a camera by MIT that is capable of capturing hidden things using laser. Now, three researchers from Israel have made a camera that can see around corners, through solid objects like frosted glass, and skin using normal light. You don't need to set-up expensive equipments any more, the new camera will work in normal light.
Instead of using x-rays or complex lasers, the three researchers Ori Katz, Eran Small, and Yaron Silberberg from Israel’s Weizmann Institute of Science used natural light, a CCD camera and a Spatial Light Modulator (SLM).
The camera uses a surprisingly simple technique. It captures light scattered from an object (known as white noise) and amplifies the noise at a scale of 1000 times. So, when you capture images of an object on the other side of a frosted glass, the camera actually captures the scattered light of the glass surface and amplifies it to reproduce the image of the object on the other side.
The camera uses a Spatial Light Modulator (SLM) to modulate the white noise into noise free light.When light reflects off a surface, each point on that surface modifies the phase of light differently. Spatial Light Modulator (SLM) alter the phase of light according to the current passing through them. The researchers employed a genetic optimization algorithm to adjust each and every pixel of SLM till an accurate and crisp image is created out of the white noise.
Scientists hope this camera will prove to be useful in medical imaging.
Source : Weizmann Institute of Science
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