SYSTEM FOR DETERMINING A LOCATION ON A 2D SURFACE OR IN A 3D VOLUME

A system for determining a location on a 2D surface or in a 3D volume. The system includes a probe and a tracker. The probe includes a marker, an indicator, and a reflective surface, wherein the probe is configured so the reflective surface forms a virtual image of the marker having an apparent location coincident to a location of the indicator. The tracker configured to measure the apparent location of the virtual image of the marker.