How does the hologram work on japan’s hologram self checkouts?

Question

[Here](https://youtube.com/shorts/Y9hBiBTw9LY?feature=share) is a video of it.

In: 7

Answer 1

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.