During the French presidential campaign, candidate Jean-Luc Melenchon appeared at multiple rallies at the same time using the more bulky holographic technology.
But these aren't true holograms, they're near approximations.
To create ideal holograms, a medium of certain thickness needs to be modified in such a way that different sections reflect light in different phases. That thickness has usually been around a few millimeters at the minimum.
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday electronics like smart phones, computers and TVs.
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"Conventional computer-generated holograms are too big for electronic devices but our ultrathin hologram overcomes those size barriers", explained Professor Min Gu from RMIT University.
The tech is simple to make, it can be seen with the naked eye without 3D goggles and is 1,000 times thinner than human hair. "Our nano-hologram is also fabricated using a simple and fast direct laser writing system, which makes our design suitable for large-scale uses and mass manufacture".
It's needs to be noted that the prototype created by the team doesn't produce freestanding holograms. However, to generate enough phase shifts, those holograms need to be at the thickness of optical wavelengths.
As the Minh Gou said, "incorporating nano-holograms into everyday electronics will make irrelevant the size of the screen, since a 3D hologram will emerge and display a wealth of information that does not fit on a phone or clock screen".
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"From medical diagnostics to education, data storage, defense and cyber security, 3D holography has the potential to transform a range of industries and this research brings that revolution one critical step closer", Gu said.
These "floating images" were created by research teams at Melbourne's specialist technology university RMIT and the Beijing Institute of Technology.
Dr Zengji Yue, another scientist on the project, said: "This involves shrinking our nano-hologram's pixel size, making it at least 10 times smaller". Gu says that would depend on money matters.
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