1. An optical measuring device for measuring a surface contour of an object, comprising: a tripod; a camera platform mounted on the tripod; at least first and second photo cameras arranged on the camera platform for imaging the object comprising marking elements, wherein the at least first and second photo cameras are arranged on the camera platform to carry out imaging the object from first and second different perspectives; and a displacement device arranged between the platform and the tripod for the linear displacement of the camera platform in three directions independent of each other, wherein the displacement device comprises first, second and third precision slide guides operating perpendicularly in relation to each other, wherein each of the first, second and third precision slide guides comprises a calibrated measuring system for measuring the displacement path.