We introduce a simple technique that enables robust touch" onclick="tagshow(event)" class="t_tag">multi-touch sensing at a minimum of engineering effort and expense. It relies on frustrated total internal reflection (FTIR), a technique familiar to the biometrics community where it is used for fingerprint image acquisition. It acquires true touch information at high spatial and temporal resolutions, and is scalable to very large installations.

Han, J. Y. 2005. Low-Cost Multi-Touch Sensing through Frustrated Total Internal Reflection. In Proceedings of the 18th Annual ACM Symposium on User Interface Software and Technology

Short video [13MB] (pretty old)

HI

Is this technology the same as I-phone used?

我觉得应该不是，这个技术是去年才出来的，而 iphone 的研制很早就开始了。