Kirkpatrick-Baez (KB) and Lobster Eye (LE) Optics for Astronomical and Laboratory Applications
Figure 4
Principle of Montel optics (a) and simulated intensity distribution in the focal plane when no apertures are used (b): shadow of the mirrors (dark blue), direct rays (light blue), line foci (green) and focus point (red). Adopted from http://www.x-ray-optics.de/ [3].