Optically Jointed Probing Systems for Large-Volume Coordinate Metrology

Abstract

This article outlines some system concepts and related instrumentation design features for optically jointed probing systems. This is a general description for largevolume coordinate metrology systems which include optical links, but which also reduce line-of-sight restrictions through the use of six-degree-of-freedom (6DOF) target connectors. Recent commercial developments of walk-around probing systems provide this facility to some extent. The objective of this article is to consider how these systems could be extended to cover larger volumes and to reach deeper into objects to be measured. BACKGROUND The walk-around concept in 3-D probing offers real flexibility and convenience to users, with a range of offerings such as Leica’s T-System, API’s Intelliprobe, Metris’ K-System and 26 The Journal of the CMSC/SPRING 2007