Volumetric display - 3D images in the air

[pocaracas]

Ladies and Gentlemen, the future is approaching!

Volumetric displays will be a reality within my lifetime!

https://www.nature.com/articles/d41586-018-01125-y

The technique, described in Nature on 24 January1, works more like a high-speed Etch a Sketch: it uses forces conveyed by a set of near-invisible laser beams to trap a single particle — of a plant fibre called cellulose — and heat it unevenly. That allows researchers to push and pull the cellulose around. A second set of lasers projects visible light — red, green and blue — onto the particle, illuminating it as it moves through space. Humans cannot discern images at rates faster than around 10 per second, so if the particle is moved fast enough, its trajectory appears as a solid line — like a sparkler moving in the dark. And if the image changes quickly enough, it seems to move. The display can be overlaid on real objects and viewers can walk around it in real space.