Determining Polarization Rotation Characteristics of a Sample Taking Into Consideration a Transmission Dispersion

An optical measuring system for determining polarization-optical properties of a sample, the optical measuring system, comprising:

• a polarization state generator which is configured for preparing a measuring light which is propagating along an analysis beam path with a defined polarization state;
• a sample receptacle which is arranged downstream of the polarization state generator in the analysis beam path and which is adapted for receiving the sample;
• a polarization state analyzer which is arranged downstream of the sample receptacle in the analysis beam path;
• a detector which is arranged downstream of the polarization state analyzer in the analysis beam path, for detecting an intensity of the measuring light,
• wherein the polarization state analyzer and the detector are configured for capturing a polarization rotation αP(λeff) of the measuring light which is caused by the sample;
• and
• an evaluation and control unit for evaluating measuring signals from the detector and/or from the polarization state analyzer and/or from the polarization state generator,
• wherein a wavelength-spectrum of the measuring light contains a first wavelength λ1 and a second wavelength λ2,
• wherein the detector is configured for detecting measuring light with the first wavelength λ1 separated from measuring light with the second wavelength λ2, and
• wherein the evaluation and control unit is configured for calculating a polarization rotation αP(λ0) of the measuring light which is caused by the sample at a standardized wavelength λ0 in dependency from
• (a) a first polarization rotation αP(λ1) at the first wavelength λ1,
• (b) a second polarization rotation αP(λ2) at the second wavelength λ2,
• (c) a first transmission T(λ1) of the sample at the first wavelength λ1, and
• (d) a second transmission T(λ2) of the sample at the second wavelength λ2.