Left to right: the telescope entrance pupil phase obtained with the first 40 Zernike modes. The Strehl ratio is 95% @ 650 nm. In the center, the phase screen that simulates high-frequency polishing defaults for the l_p = 2 beam. Right, the phase screen for the l_p =  −2 beam. These two last phase screens are the superposition of two different random simulations (common and non-common path errors). The last case (l_p =  −2) is simulated with a shift of the second phase screen (8.1% in the y-axis with respect to the pupil diameter). The sigma of the two phase error screens for l_p = 2 and l_p =  −2 are chosen equal to λ/50 rms @ 650 nm.