0710 GMT October 19, 2019
The report sheds light on free-space volumetric display, a breakthrough made by a group of researchers at Brigham Young University in the western US state of Utah, according to xinhuanet.com.
The report said, “The new thing can also be interpreted as displays that create luminous image points in space, as those displays are capable of producing images in ‘thin air’ that are visible from almost any direction and are not subject to clipping.”
It is impossible to get light to just stop dead in air, so it has led doubt that we can never realize 3D projections.
However, the research team led by holography expert Daniel Smalley has managed to pull it off thanks to some very special lasers.
According to the Nature report, this display works by first isolating a cellulose particle by forces conveyed by a set of near-visible laser beems in a photophoretic trap.
The trap and particle are then scanned through a display volume while being illuminated with red, green and blue light.
The result is a three-dimensional image in free space with a large color gamut, fine detail and low apparent speckle.
Smalley said, "This display is like a 3D printer for light. You're actually printing an object in space with these little particles.
“At the moment, the projections that are possible with the technology are extremely tiny — perhaps a butterfly or just a university logo. The technology is not quite ready for primetime yet.”