Combined Scanner and Tracker device with a focusing mechanism

The invention relates to a three-dimensional (3D) coordinate measuring machine, wherein the tracker functionality and scanner are combined. The tracker function is configured to transmit light to a retroreflector, and to determine the distance to the retroreflector on the basis of the reflected light. The tracker is also configured to track the retroreflector during its movement and to determine the 3D coordinates of the retroreflector. The scanner is configured to send a beam of light to a point on an object surface and to determine a 3D coordinate of the point. The scanner is also configured to focus the light beam adjustable.