WISE results for a Wolter-I mirror as in Fig. 11 at λ = 20 Å with the profile error described by Eq. (50) and w₁> 0, but this time w₂< 0. Also plotted for comparison is the PSF simulated from the single reflection (arrow). The opposite curvatures of the profile errors largely balance each other, as expected. Here the predictions of the Fresnel diffraction (lines) also agree with the geometrical optics (dots).