"The magic window we created appears perfectly flat to the naked eye but, in fact, has slight variations that create an image in response to light," said team leader Felix Hufnagel.
MAGIC WINDOW COMPANY TV
The ability to make both transparent and mirrored surfaces switch between their natural optical behavior and the display of some other form of image has been a fixture in fiction and a challenge in the real world for some time.īack in 2003 Philips developed a "magic mirror" TV screen, which integrated a liquid crystal (LC) display with a wall-mounted mirror, switching functions through a polarized coating that controlled light transmission.Ī project at the University of Ottawa has now used LCs to create a flat and polarization-switchable "magic window" - a transparent device that produces a hidden image when light shines on it, modernizing an old optical illusion.Īs reported in Optica, the principle behind the device could lead to new forms of 3D display, or be miniaturized to operate on sub-wavelength scales.
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