Ultra Cool Holography: Lets Users "Touch" Virtual Objects
Researchers at the University of Tokyo led by Hiroyuki Shinoda have developed a display that lets users "touch" objects that appear to float in space in front of them. The virtual objects appear in mid-air via an LCD and a concave mirror, and a bank of aimed ultrasonic emitters creates the sensation of touching the objects.
http://www.dailygalaxy.com/my_weblog/2009/08/revolutionary-holography-lets-users-touch-virtual-objects-video.html
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