3D adverts could appear out of thin air

By David Hambling ADVERTISING displays could soon appear out of thin air, thanks to a laser system that projects moving 3D images in the sky. The system, developed by Burton of Kawasaki, Japan, focuses a laser pulse onto a point in the air to ionise it, briefly creating a ball of glowing plasma, dubbed a flashpoint. By firing hundreds of laser pulses each second, the system creates the illusion of many constant points of light. “Firing hundreds of laser pulses each second creates the illusion of constant points of light in the air” An early version of the system,
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