Not to be confused with Jeff Han’s multi-input touchscreen, FTIR touch sensing “relies on frustrated total internal reflection (FTIR), a technique familiar to the biometrics community where it is used for fingerprint image acquisition”. Video demonstration after the jump.

We introduce a simple technique that enables robust multi-touch sensing at a minimum of engineering effort and expense. It acquires true touch information at high spatial and temporal resolutions, and is scalable to very large installations.

Not to be confused with Jeff Han’s multi-input touchscreen, FTIR touch sensing “relies on frustrated total internal reflection (FTIR), a technique familiar to the biometrics community where it is used for fingerprint image acquisition”. Video demonstration after the jump.

We introduce a simple technique that enables robust multi-touch sensing at a minimum of engineering effort and expense. It acquires true touch information at high spatial and temporal resolutions, and is scalable to very large installations.