Robot-based Gonioreflectometer

Abstract

The new gonioreflectometer of the PTB enables high precision goniometric measurements of diffuse reflecting samples within the whole hemispheric range above the surface of the sample, due to its out-of-plane capabilities, by using a 5-axis-robot. The whole facility was build using standard laboratory and engineering equipment. The five-axis robot model RV-2AJ from Mitsubishi Electric could be used without any modification for this unusual field of application. The current wavelength range for measurements and calibrations is 250 nm to 1700 nm. It is planned to extend this wavelength range up to 2500 nm in the near future. It is also planned to install an additional lamp with increased UV output power in order to improve the current uncertainty budget for measurements in the UV range.