A miniaturized multidirectional optical motion sensor and input device based on laser self-mixing

摘要: Using the laser self-mixing effect, a miniaturized two-dimensional motion sensor has been developed that works on almost any light-scattering surface. By applying to surface of finger, for example, an input device (scroll, click) can be built hand-held applications. A three-dimensional (x, y, click), which will presented soon, is based principles explained in this paper. We also present physical and technological challenges solutions required build practical, robust device.