Some applications call for a portable solution, for example taking measurements on a shop floor or in the field. In these cases an Optical CMM can be used to gather measurement data for areas that are difficult to reach. The hand-held device transmits data wirelessly and allows the operator to move both the part and the scanner during the measuring process. Using stereoptics to scan an object, the Optical CMM uses 2-3 cameras to track either passive retroreflective or active targets through space. This process allows objects to be rebuilt in 3D via the device’s reflectors.