Process for automatically measuring the birefringence of transparent bodies, e.g., glass, comprises radiating sample with polarized light beam, receiving the intensity of the transmitted light of the sample and determining the phase shift

摘要

Process for automatically measuring the birefringence of transparent bodies comprises radiating the sample to be investigated with a polarized light beam; receiving the intensity of the transmitted light of the sample after it has passed through an analyzer and determining the phase shift of the light intensity as a measure for the birefringence. The intensity signal is digitized and the position of the crossover is carried out by a micro- and/or signal processor with the aid of an interpolation process.