Soldiers may wrap themselves with the foldable 500-gram sheet when on the move and join their sheets together to build a barrier that resembles a rock when they set up a position.įor Vollebak's creation, it's hoping to scale the technology up and scale the graphene pixels down "over the next decade."
In 2020, Israel's Ministry of Defense and tech company Polaris Solutions unveiled a camouflage sheet that has thermal visual concealment material, which makes soldiers more difficult to see with a range of thermal cameras. Intended for military use, the paper-thin cloak-like technology bends light around a target, hiding infrared, ultraviolet, and thermal signals. In 2019, Canadian company Hyperstealth Technology filed a patent for a "quantum stealth" material that can make objects disappear, though not entirely. In any case, as English poet Robert Browning writes, a man's reach should exceed his grasp. Electronic devices and fabric, Vollebak said, are "historically incompatible" because one is hard and the other is soft, posing a number of interdisciplinary challenges. Second, hiding humans on the infrared spectrum needs something that's part clothing, part machine-an unprecedented concept. Vollebak itself also acknowledged two "interconnected problems" that makes outright invisibility impossible in real life. “Even with active cloaks, Einstein’s theory of relativity fundamentally limits the ultimate performance for invisibility,” the study said. In contrast, it's "essentially impossible" to cloak the human body or a military tank from visible light waves. Their study, published in peer-reviewed journal Optica, cited as example a medium-size antenna which can be cloaked from radio waves, over relatively broad bandwidths for clearer communications. Larger objects, they said, also pose more limitations. In 2016, researchers from the University of Austin in Texas found that there are fundamental physical limitations in rendering an object undetectable to radio waves, microwaves, infrared, and visible light. "While the Thermal Camouflage Jacket only operates on the infrared spectrum today, by using graphene, it should ultimately be possible to build a version that also operates on the visible spectrum at the same time," Vollebak said. A post shared by Vollebak patches, Vollebak noted, can be coded to emit a different level of thermal radiation, letting it blend into surroundings and appear invisible to infrared cameras.
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