Evaluation of the influence of the surface dulling process on the result of optical coordinate measurement

The paper presents research aimed at checking relation between the obtained accuracy of the optical coordinate measurement in the context of the type of 3D scanning spray used and in the context of the matting strategy used during the measurements. The research was carried out in the Laboratory of Coordinate Metrology at Cracow University of Technology. The measurements were performed with a Romer Absolute Arm with a laser head. Measurements of standards with and without matte coating were made using sprays with different properties (sublimating and non-sublimating). The research also concerned the impact of various strategies of forming the matt layer on the object surface on the measurement result. The dulling time, atomizer pressure, and one-step and two-step dulling were changed. The tests were supplemented with measurements on the ZEISS O-Inspect multisensory coordinate measuring system and on the Altisurf 500 multisensory machine for measuring surface roughness and topography. The positive effect of using matting sprays was confirmed. It was shown that the accuracy of optical coordinate measurement depends on both the selected 3D scanning product and also used matting strategy.