Anand D
Author
This display can show two different images at the same time - no VR headsets, no software tricks, just pure optics. This is a two-way holographic display made by Julius Makes. The whole idea is that two players, sitting opposite to each other, should see the mystery instructions meant for the other person. Plus, they should be able to see their faces through the glass while playing as well.
This is how it works. Light entering a beam splitter cube hits a 45° plane inside the glass — some passes through, some reflects at 90°. So if we put a screen on one side and look from the other side, we will be able to see the contents of the screen. The same principle applied on the other half of the cube ensures both images exist simultaneously. He designed and 3D printed a custom enclosure that accommodates the beam splitter, two Monochrome OLED displays and a Wemos D1 Mini MCU. After assembling everything, the project was ready for action. It displays entirely different content on each side and works perfectly
If you want to build one, here are the links to the build files
Code
