Observations on the influence of the polarisation of light waves and material properties on laser intensity measurements in electronic distance measurements

Abstract

This master's thesis deals with the influence of material surfaces on the backscatter intensities of laser measurements with total stations. The aim is to analyse whether different polarisations of the incident light and different material surfaces have an influence on the reflection and backscatter intensity of the light. These analyses are carried out for angles of incidence of 0-89 gon. These analyses are intended to show that Fresnel's law can also be applied with a total station. Two different total stations were used for this purpose: ATS600 and MS60. Of the 6 different materials (steel, aluminium, 2 polymers and 2 ceramics), Fresnel could be fully demonstrated with the Leica MS60 for one ceramic, for the other ceramic up to an angle of incidence of 80 gon, as the last measurement for the second ceramic could no longer be sufficiently evaluated. The other materials were not suitable for an evaluation due to their very high reflectivities like metals, or very low reflectivities like polymers.