Hi there,
I'd like to learn more about ultrasonic stilus (see, for example, link)
http://www.engadget.com/2012/03/01/hands-on-with-wireless-ultrasonic-stylus-and-touchless-gestures/
The most interesting are size of covered area, spatial resolution of positioning, how robust the system is if reflection of ultrasound from arms takes place.
Thanks.
Vadim Shofman,
Sr. Opto-Mechanical Engineer
