Observed polarimetric beamshift for a stellar PSF of α Cen B taken in June 2016 with the VBB and ND4 filters: The first row shows two consecutive polarization frames (I_o − I_e)₀ and (I_o − I_e)_Π taken with opposite, zero and pi demodulation phase shifts and the resulting, charge-trap corrected, Q⁺-frame. The third row illustrates the beamshift for the derotated Q⁺-, Q⁻-, and the final “science” Q-image. The second and bottom rows show the same but with the beamshifts corrected between the odd-row I_o and even-row I_e sub-frames.