Observed intensities in the focal plane, in logarithmic scale. The transverse radius is given in solar units. The intensities are normalized to the mean solar brightness. Blue: system S_Ø given by I_B(r) in plane B, as reference. Black: deviation from system S_EL, with the internal occulter set in plane B, given by I_D(r) in plane D. Red: system S_EL, with the internal occulter set in plane O′, given by I_D(r) in plane D.