Fig. 5

Sensitivities of diattenuation and retardance. a Repeatability of diattenuation as a function of its true value expressed in RMS OZP. Colors denote the true values of the corresponding retardance of the pupils. A dotted red line going through the origin (0,0) has a slope of 1, where the true values equal to repeatability, defining sensitivity. Pupils with the polarization properties inside gray shaded areas have worse repeatability than the true values. b Repeatability of retardance versus the true retardance of the pupils. Colors denote the true values of the corresponding diattenuation of the pupils expressed in RMS OZP. Each repeatability is calculated from 100 trials, where each trial follows the complete flow in Fig. 4a. Black arrows point to the pupils that meet our definition of sensitivity, and polarization properties of these pupils are visualized in Fig. 6