Clear HUD materiel can be applied to windows like tint
A group of researchers at MIT have announced the invention of a transparent display that could usher in the next generation of heads up displays. The scientists say that the HUD they have developed could be cheaply and easy applied to windows, car and aircraft windshields, and eyeglasses.
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The transparent display should be cheap to manufacture, simple, and be able to scale according to the team. The display doesn't require a mirror or splitter like a normal HUD. The new invention uses nanoparticles embedded in a thin transparent material like plastic that can scatter certain wavelengths of light.
That allows the display to produce certain colors of light on the screen and let the rest of the light pass through. It results in what appears to be a clear window that can show video and other content. The team used silver nanoparticles in their research and created a working display. They note that is should be able to produce a full color version. The thin plastic that holds the nano particles could be applied to glass in a manner similar to tinting windows.
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“The glass will look almost perfectly transparent,” researcher Marin Soljačić says, “because most light is not of that precise wavelength” that the nanoparticles are designed to scatter. That scattering allows the projected image to be seen in much the same way that smoke in the air can reveal the presence of a laser beam passing through it.