Human sensory fusion on visual and tactile sensing for virtual reality

In general, design and realization of hardware of haptic device for virtual reality are very difficult because of the complicated mechanisms required to realize many degrees of freedom. On the other hand, it is well known that humans have illusions on sensations such as vision. Therefore, it is expected that the hardware of virtual reality can be simplified if we make good use of human illusions. From such a motivation we measure human illusion on distances between the thumb and the forefinger and curvatures of the finger touch surface. From the measurement results, some important points are suggested to realize simplified haptic device.