| Title | Photophoretic-Trap Volumetric Display (Star Wars-like "Hologram") Created | |
| Date | Thursday January 25 2018, @06:18PM | |
| Author | Fnord666 | |
| Topic | ||
| from the wookies-have-been-known-to-do-that dept. | ||
https://www.nature.com/articles/d41586-018-01125-y
The technique, described in Nature on 24 January, 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.
The images created so far are tiny — just millimetres across. And only simple line drawings can be created at the speeds needed to fashion moving images. The team managed to depict a moving spiral line drawing and the static outline of a butterfly. The technique needs substantial development but is a simple design with huge potential for improvement, says William Wilson, a researcher in nanotechnology at Harvard University in Cambridge, Massachusetts.
Also at Science Magazine and Phys.org (Associated Press).
A photophoretic-trap volumetric display (DOI: 10.1038/nature25176) (DX)
| Links |
printed from SoylentNews, Photophoretic-Trap Volumetric Display (Star Wars-like "Hologram") Created on 2023-07-17 20:59:42