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If you're a Harry Potter enthusiast, you're likely familiar with the enigmatic invisibility cloak, aiding the protagonist in escaping perilous situations. With today's scientific and technological progress, we'll soon acquire a cloak akin to Harry Potter's within the next 10 years.
Recently, scientists from a London-based startup, Vollebak, announced plans to manufacture a real-world invisibility cloak. Collaborating with the University of Manchester, researchers have developed a cloak capable of rendering humans invisible to infrared and night-vision devices.
The head of the research team at Vollebak stated that the product is engineered to render humans invisible to infrared cameras. It's a computer-programmed cloak, bringing us a step closer to fictional invisibility cloaks becoming reality. This product is expected to hit the market in approximately 10 years.
Over the past three years, scientists have focused on researching various fields including physics, optical materials, electronic control systems, textile manufacturing, and fabricating techniques to create a single suit that everyone can wear. It's an advanced optical device for the future, aimed at supporting military applications.
From the outset, this prototype invisibility cloak comprises a total of 42 graphene patches, each constructed from over 100 layers of pure graphene. Graphene, a burgeoning material, is increasingly finding utility across various everyday domains due to its exceptionally superior properties. It adopts a carbon honeycomb structure comprising closely bonded carbon atom layers arranged in a two-dimensional network.
Gold and copper wires will run to each patch and can be controlled to apply different voltages to them. There, the electrical potential between ions and densely packed graphene layers pushes more ions. This helps limit the emitted heat radiation, making this invisibility cloak cooler, undetectable by infrared cameras.
Scientists have created a simple example, coding to allow Tetris players through infrared lenses. Instead of seeing heat emitted from a regular human body, the camera only sees a computer-generated part emitting heat. One special aspect is that each patch can be programmed individually to emit different amounts of heat radiation.
Thanks to individually programmed patches, this invisibility cloak can blend into the surrounding environment and become invisible to infrared cameras and night vision goggles. If perfected, individuals wearing this cloak will blend into an empty space in the dark night, undetectable by conventional means.
In theory, graphene, when impacted by energy, will alter its appearance when viewed through an infrared spectrum. Changing the charge density of graphene will change the colors we see. When controlling the wavelengths properly, we can create a truly invisible cloak. On the other hand, cost and practicality issues also need to be thoroughly addressed.
This isn't the first time invisibility cloaks have been introduced. About three years ago, Quantum Stealth was developed by Hyperstealth—making the concept of an invisibility cloak more tangible than ever. This new material is described as thin as paper, cost-effective to produce, and doesn't require power to operate. Essentially, the working principle of this invisibility solution is like seeing some images as 3D, depending on how you observe them.
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