Amplitude of the Q/Iπ component (upper panel) and the average of the blue and red lobe σ components (bottom panel) as a function of μ for the 7 solar regions with only weak background intranetwork-type fields. Filled circles: 5250.22 Å line. Open circles: 5247.06 Å line. The dashed line represents the position of the polarization zero level before being shifted to the continuum level.