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XNUMXD images can be touched

26.07.2015

The Japanese company Burton Inc, together with scientists from Tokyo, Tsukuba, Utsunomiya and Nagoya Technical Universities, has developed a technology for demonstrating three-dimensional images of Fairy Lights, which forms an object from plasma droplets using a femtosecond laser directly in the air.

Burton Inc's previous development was the Aerial Burton Laser Projection Display, which displayed three-dimensional images and text in space.

Now the technology of creating volumetric pixels, or voxels, from ionized gas with ultrashort laser pulses has made it possible to make images tangible.

Plasma voxels are formed by ionizing the air at the focal point using many extremely short pulses of an infrared laser passing through a 3D scanner with a varifocal lens. In a microscopic drop of plasma, excess energy is released in the form of blue photons.

Volumetric pixels disappear fairly quickly, so the laser must fire several hundred thousand pulses per second to maintain a stable image. Until recently, it was impossible to touch such pictures, because the laser exposure led to a burn.

The new Fairy Lights system uses femtosecond lasers, whose pulse duration is so short that they do not have time to cause any damage to a person. The plasma becomes brighter when touched, and the laser-generated shock waves evoke a tactile sensation.

The plasma provides visual and tactile feedback, and the 3D images can serve as indicators or spatial controls. Burton Inc engineers believe their technology could lead to full-fledged XNUMXD touch displays.

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