This Diffraction Grating Clock Hides Its Digits — Unless You're Looking Through the Lens
Physicist and electronic artist Moritz v. Sivers, of the YouTube channel Twisted&Tinned, has designed an LED matrix clock with a difference: it projects the time through a diffraction grating, giving it a three-dimensional effect.
"During my way out of the rabbit hole of making holograms I stumbled upon diffraction gratings. Both topics are closely related since a hologram actually is a type of diffraction grating," Sivers explains. "I ordered some cheap diffraction grating sheets and thought about a way to turn this into some kind of display. I came up with the idea of using the grating to separate the colors from an RGB LED and found a design to turn this into a clock."
A diffraction grating is a material that has been etched or otherwise treated with a fine pattern designed for the controlled diffraction of light, and was first spotted in nature in birds feathers giving them...
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