Invisible 3D holograms that can be seen and felt created using ultrasoundconcertina226 (2447056) writes "Computer scientists at the University of Bristol have developed invisible 3D object holograms in mid-air that can be felt and seen using ultrasound, which could one day be used to help surgeons "feel a disease" in a CT scan.
The UltraHaptics technology works by pulsing high-frequency sound waves from tiny speakers that exert pressure on a person's hand to create the feel of haptic holograms, i.e. an object that can be touched by applying forces, vibrations or motions to the user.
The system also makes use of a Leap Motion sensor that can track the position of a person's hand in order to decide where in the air to create the object.
In order to be able to actually see the objects, the researchers projected the sound waves onto a thin layer of oil, and the depressions of the shapes and how the shapes move can clearly be seen on the surface."
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