Analysis of the Influence of the Adjustment Error of the Differential Phase Polarimeter Analyzer on the Informative Signal Parameters

The purpose of this work is to improve the accuracy of measurements of the optical rotation angle (ORA) by analyzing the effect of the adjustment error of the differential phase polarimeter analyzer. The paper presents the scheme of the differential phase polarimeter used for studying optically active substances. To analyze the effect of the alignment error of the rotating analyzer on the ORA measurement results, mathematical modeling of the process of forming the informative signal in the presence of a deviation from the perpendicular plane of the analyzer relative to the axis of radiation propagation was applied. The results of the study of the influence of the adjustment error on the accuracy of restoring the phase difference of two harmonic signals are presented. The results obtained make it possible to develop the requirements for the adjustment of the elements of the differential phase polarimeter to increase the accuracy of the ORA measurements.