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The 'bat signal' of the future: Free-floating laser images could be fired into the sky to alert people to disasters

Ellie Zolfagharifard for MailOnline

Oct. 20, 2014

Technology offers possibility to project messages into a cloudless sky
Scientists showed off spirals, fluttering butterflies and outline of an apple
Technology works by focusing intense laser light into a spot in the air
This makes the molecules there emit light that looks like a bright LED
Bursts of light come hundreds of times a second, and as the beam moves, form what appear to be a three-dimensional image

The bat signal that alerted the caped crusader to trouble brewing in Gotham City could soon become a reality.

A free-floating image created by firing lasers into thin air was today unveiled in Japan, offering the possibility if one day of projecting messages into a cloudless sky.

Like the bat signal, its inventors hope that it might someday be used to warn people of danger, such as an approaching tsunami.

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A free-floating image created by firing lasers into thin air was today unveiled in Japan, offering the possibility if one day of projecting messages into a cloudless sky

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