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Researchers at the National Institute of Scientific Research of Montreal (INRA) published a study in Optek magazine detailing a new method of disappearance.
Their device – called "spectral cape" – is the first device to manipulate color (frequency of light waves) that interact with objects, making them invisible.
The author of the study, Jose Isana, said in a press release: "Our work represents a breakthrough in the search for a new way to hide." There is what is called the electromagnetic spectrum: this spectrum includes all the different frequencies of electromagnetic radiation, a particular type of energy that includes X-rays, gamma rays and radar, all located somewhere on this spectrum.
Although we can not see X-rays, our eyes can see a small range of frequencies on the electromagnetic spectrum, what we call visible light.
As we have mentioned, a range that shows what we see as colors, with the purple at the end and the red at the other end, contains light sources on several frequencies (we call them broadband sources) and sunlight is an example.
When we see something, what we actually see are interactions between the optical frequencies and the body.
When the sun shines on a blue car, the car reflects the frequency of the blue light while all other color frequencies pass easily over the body, and our eyes see the blue light reflected allowing us to see the blue car .
The concealment device developed by the researchers benefits from this interaction, using a body that only reflects green light.
To make this body invisible to the human eye, researchers use a specially designed candidate to temporarily convert the green frequencies of the body's high-speed shining blue.
Then they use another candidate to convert these frequencies to green on the other side of the body.
The result? The human eye can not see it!
At present, the detection device developed by the researchers only works in one direction and the viewer must follow the path of light by looking at the body through the first filter .
In any case, Isana claims that the method can theoretically render an object invisible from all directions.
At present, the device can help secure communications, which use broadband waves to transmit their data.
Telecommunications operators can make certain frequencies invisible along their own fiber optic networks, which prevents external parties from using broadband light to spy on them.
Although we can not all hide ourselves as in the human figure hidden in animation, we can take advantage of this technique to hide our data right now.
- Translation and editing: Tasnim Loung
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