[Here](https://youtube.com/shorts/Y9hBiBTw9LY?feature=share) is a video of it.
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Mirrors and lenses can mess with the light rays. The light for the display is coming from under the glass, but they’ve used some tricky mirrors and lenses to kinda focus it weird, so when you move your head left the light moves right in your field of vision *move* than the glass does, so your brain interprets it as the light must be closer to you than the glass. But notice how the light always cuts off at the edge of the glass, that’s because it’s actually behind the glass.
And probably a miniature radar to detect where your hand is.
It uses a device called an Aerial Imaging Plate
[https://i.kinja-img.com/gawker-media/image/upload/c_fit,f_auto,g_center,pg_1,q_60,w_965/3e24b8e3bd92cfabecfb7df471b6b56b.jpg](https://i.kinja-img.com/gawker-media/image/upload/c_fit,f_auto,g_center,pg_1,q_60,w_965/3e24b8e3bd92cfabecfb7df471b6b56b.jpg)
The physical display is inside the machine. The light emitted from it travels through a special fresnel lens that redirects and focuses the light into an area of space directly above it in midair.
Someone might be able to tell you if this qualifies as a genuine hologram or just an illusion.
What a horrible user experience. At least it’s 5x the cost of a normal display.
Same way the old 3D hologram arcade games used to work – mirrors and lenses.
https://en.wikipedia.org/wiki/Time_Traveler_(video_game)
It only works from a small angle for a reason, that’s the only place where the mirror/focus will work to form a 3D image.
The way this one can detect your finger is also pretty simple nowadays: if you have multiple cameras looking at the area, you can detect objects like that and what they’re pointing at in 3D space. We never used to have the processing power for that.
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