Digital Nature Group details a working prototype for a hologram you can feel

Holograms, once a staple of science fiction let alone something available to the touch, have been more and more of a reality in recent years. Digital Nature Group has extended the concept further in a recently published paper describing holograms that a user can touch. They presented this paper to several Japanese universities for further research and development.

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Like other holograms, these touchable versions are powered by lasers forming a grid of visible beams that come together to form an image. The lasers used in most holograms, also known as nanosecond lasers, can be dangerous to the touch. Femtosecond lasers, which pulse on cycles below one picosecond, are safer and more suitable to be touched by users, allowing people to interact with the image projected without risking burns.

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