he Leap Motion controller is a new consumer-grade sensor developed by Leap Motion (Leap Motion, http://www.leapmotion.com). It is primarily designed for hand gesture and finger position detection in interactive software applications. Because of current patent pending, only insufficient information on the underlying software's geometrical or mathematical frameworks is available. Nevertheless, first impressions of position detection capabilities are promising (Section 5). Thus, the presented analysis does not focus on the controller's technical details. A detailed analysis of the sensor's accuracy and repeatability will be presented. Figure 1 shows a schematic view of the controller's hardware setup. Besides three infrared emitters the device incorporates two CCD cameras (cf. Figure 1(a)). As stated by the manufacturer, the sensor's accuracy in fingertip position detection is approximately 0.01 mm.