Scientists have finally discovered how to manipulate nearly unseen specks in the air and use them to create 3D images that are more realistic and clearer than holograms, according to a study in Wednesday’s journal Nature . The study’s lead author, Daniel Smalley, said the new technology is “printing something in space, just erasing it very quickly.”
The tiny specks are controlled with laser light, like the fictional tractor beam from “Star Trek,” said Smalley, an electrical engineering professor at Brigham Young University. Yet it was a different science fiction movie that gave him the idea: The scene in the movie “Iron Man” when the Tony Stark character dons a holographic glove. That couldn’t happen in real life because Stark’s arm would disrupt the image.
Going from holograms to this type of technology – technically called volumetric display – is like shifting from a two-dimensional printer to a three-dimensional printer, Smalley said. Holograms appear to the eye to be three-dimensional, but “all of the magic is happening on a 2D surface,” Smalley said.
The key is trapping and moving the particles around potential disruptions – like Tony Stark’s arm – so the “arm is no longer in the way,” Smalley said.
This method could one day be used to help guide medical procedures – as well as for entertainment. However, it is still years away from daily use.
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