Automatic measurement of dimensional data with a laser tracker

摘要

Measuring with a system having retroreflector targets and a laser tracker includes storing a list of nominal coordinates for three targets and at least one additional point; capturing on a photosensitive array of the tracker a portion of the light emitted by a light beam and reflected off the three targets; obtaining spot positions on a photosensitive array of a tracker camera from light reflected off the three targets; determining a correspondence between three spot positions on the tracker photosensitive array and the nominal coordinates of the three targets; directing a beam of light from the tracker to the three targets based at least in part on the nominal coordinates of the respective target and spot position in each case; measuring 3-D coordinates of the three targets with the tracker; directing the light beam to a plurality of additional points, the plurality of additional points including the at least one additional point, the plurality of additional points indicative of actions to be taken by an operator; determining 3-D coordinates of the at least one additional point based at least in part on the measured 3-D coordinates of the three targets and the nominal coordinates of the at least one additional point.