
206 Virtual Reality: Concepts and Technologies
constraints. A possible classification of the tactile interfaces is the one related to the
domains of application. This classification has helped us to show that the majority of
the existing tactile interfaces were laboratory prototypes, often not properly completed
and certainly not adapted to mass production. Different actuation technologies have
been explored. We think it important to use these actuation technologies in a better
way, in order to exploit their optimal potential.
As regards the applications involving tactile sense in virtual reality, as we have
already indicated, very few applications ...