This holographic camera has the ability to see around corners and beneath human skin.


This holographic camera has the ability to see around corners and beneath human skin.

A new high-resolution camera developed by researchers may be able to “see the invisible.”

The camera may use scattered light to look around corners and even see through skin, allowing surgeons to view into the human body and examine organs.

The camera is a step forward in non-line-of-sight imaging research, which is concerned with depicting objects that are covered or surrounded by something that prevents them from being seen.

“Our technology will herald in a new wave of imaging capabilities,” said Florian Willomitzer, a Northwestern University researcher. “While our present sensor prototypes employ visible or infrared light, the principle is general and may be applied to other wavelengths,” says the researcher. The team’s technology might also be used to photograph fast-moving objects like a beating heart through the chest or rapid autos around a street corner.

Willomitzer co-authored a report in the journal Nature Communications that details the camera’s development.

What is the mechanism behind it?

The camera operates by scattering light that falls on a hidden object in an indirect manner, and then dispersing that light back to the camera. This entails employing the surfaces that disguise the object, such as a wall when looking around a corner, as a mirror to bounce light to the hidden object and then back to the camera.

After that, an algorithm reconstructs the light signal and builds a holographic depiction of any targets that are hidden or occluded. Synthetic Wavelength Holography is the name of the technique (SWH).

This means that if the light can be intercepted, the time it took for the light to reach the item may be determined. It’s possible to create an image that shows the hidden object from there. Something that is more difficult than it appears.

“It indicates that the team’s camera can only observe an object if it is separated from the camera by some form of barrier.”

“Walls become mirrors with this method,” Willomitzer explained.

“Nothing moves faster than light, so if you want to measure the time it takes for light to travel with high precision, you’ll need exceedingly fast detectors.”

Because such detectors are expensive, the Northwestern University team eliminated the need for one. This is a condensed version of the information.


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