Figure 3
Log-log plot of the minimum resolvable refraction angle αmin depending on the number of counts at a visibility of 38.7%.
The blue data points were measured with a water container in the beam. The red data points represent results achieved without a water container in the beam. The standard deviation of the lateral phase-shift σφ contributing to αmin according to Eq. (4) was determined in an area of 190 × 190 pixels.
