Optinen mittausjärjestelmä

摘要

An arrangement of a 3D measurement device according to the invention comprises an image source (1) in order to produce consecutive images on a surface of an object (106, 300), a camera (8) to take pictures of the surface, and a processor unit (111) in order to compare the pictures of the camera with said images. The arrangement comprises also a first area (2) and a second area (3) on the images. The arrangement further comprises at least one double detector (5) in order to detect the illuminated first area (2) and the illuminated second area (3), and a drive unit (6) in order to trigger at least one camera (8). The drive unit is arranged to trigger the camera if the double detector (5) indicates that a state of the first area changes and a state of the second area changes.