Patent Document ID: 20100209002
Application ID: 12770426
Patent Status: 0

Claim One:
1. A method for optically scanning of the three-dimensional geometry of an object by means of a triangulation method, a pattern being projected onto the object to be scanned, in order to obtain a 3D data set and the projected pattern is recorded in an image, and in a first step for creating at least one first image a first pattern is projected on the object to be scanned and in a second step for creating at least one further image a further pattern which deviates from said first pattern as regards position or shape is projected on the object to be scanned and said further image is created, and, in a subsequent step, 3D data acquired from said first image and from said further image are merged to form a 3D data set, whereas at least one correlating image containing a correlating pattern projected onto said object to be scanned is created, and said correlating image and said first created image of said first pattern projected onto said object and said further created image of said further pattern projected onto said object are oriented relatively to each other in such a manner that said first image and said further image each have, with said correlating image, at least one common point illuminated by both the correlating pattern and the first pattern or the further pattern respectively and recorded on said object to be scanned in the first or further and the correlating image of said two patterns and that the 3D data acquired from said images on the basis of the 3D data of the at least one common point in images and in the correlating image are merged to form said 3D data set such that the 3D data acquired from said images at the common point are in register with said 3D data set comprising the 3D data of the correlating image, characterized in that said first pattern and said further pattern exhibit parallel light stripes oriented in a direction R 1 , that said correlating pattern exhibits light stripes oriented in a direction R 2 which differs by a given angle a of at least 5° and not more than 90° with respect to direction R 1 in which said patterns in said first and said further images are oriented, that said common points are formed by the points of intersection between the light stripes in said pattern in an image and the light stripes in said correlating pattern in said correlating image and that said correlating image containing light stripes oriented in direction (R 2 ) shows greater spacing (d 2 ) of the light stripes than in said first and further images containing light stripes (d 1 ) oriented in direction (R 1 ).