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Issue No. 03 - July-September (2010 vol. 3)
ISSN: 1939-1412
pp: 155-165
Takayuki Hoshi , Kumamoto University, Kumamoto
Masafumi Takahashi , The University of Tokyo, Tokyo
Takayuki Iwamoto , The University of Tokyo, Tokyo
Hiroyuki Shinoda , The University of Tokyo, Tokyo
This paper describes a tactile display which provides unrestricted tactile feedback in air without any mechanical contact. It controls ultrasound and produces a stress field in a 3D space. The principle is based on a nonlinear phenomenon of ultrasound: Acoustic radiation pressure. The fabricated prototype consists of 324 airborne ultrasound transducers, and the phase and intensity of each transducer are controlled individually to generate a focal point. The DC output force at the focal point is 16 mN and the diameter of the focal point is 20 mm. The prototype produces vibrations up to 1 kHz. An interaction system including the prototype is also introduced, which enables users to see and touch virtual objects.
Emerging technologies, haptic I/O, tactile displays, 3D displays, virtual reality.

T. Iwamoto, H. Shinoda, T. Hoshi and M. Takahashi, "Noncontact Tactile Display Based on Radiation Pressure of Airborne Ultrasound," in IEEE Transactions on Haptics, vol. 3, no. , pp. 155-165, 2010.
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