Researchers at the University of Tokyo have come up with a holographic display which gives the sensation of touch as well. Holographic displays which give a sense of space occupation have been around for quite some time but none which has the sensation of touch, as it is just light.
But Hiroyuki Shinoda a researcher at the university, and his team have developed a new method in which they add a sensation of touch as well to the 3d holographic image. They call it the “airborne ultrasonic tactile display”.
The 3d holography is done using a display generator and concave mirrors to give the sensation of 3 dimensions. The sensation of touch is generated by using ultrasound. When an object comes in between a ultrasound source a pressure is generated. This pressure produces the feeling of touch on the user’s hand and is fed back to the display generator by sensors which adjusts the display accordingly. Check out this video to see the device in action.