Use in the production area
Since the measuring system is highly mobile and can be used in a variety of climatic conditions, the laser tracker can also be used in the production area in direct proximity to the processing machine. This facilitates the necessary close cooperation with quality assurance during processing. As a consequence, any necessary corrective action can be taken immediately upon evaluation of the measurement results.
Sophisticated inspection and evaluation methods have been developed which enable the laser tracker to carry out measurements which would otherwise be too costly or simply impossible with standard inspection methods.
With the Grantecan project, the laser tracker is used for a number of applications, including simple angle sum checks during the early machining stages, highly accurate radius and surface shape determination on the concave side of the mirror, and the measurement of the shape of the whole hexagonal blank. The laser tracker can also check the accuracy of the processing machines. This is very important since the shape tolerances required come down to tenths of a millimeter and even the slightest deviation during machining could result in a whole mirror segment being rejected.