No idea what this one is called, but I've used similar tools. It's like a robot arm in reverse--using inverse kinematics we can put the tip of a universal 5-axis manipulator anywhere in x-y-z space by driving the angle of the axes using motors. These scanner pens work in reverse, reading the angle of the axes to get the tip point in x-y-z space and outputting that x-y-z as a point cloud stream to your CAD program of choice.