Figure 1
(a) Schematic drawing of the biconcave parabolic Be lens. Photographs of the inspected lenses: (b) Lens #1 (R = 100 µm), face 1. (c) Lens #2 (R = 100 µm), face 2. (d) Lens #3 (R = 50 µm), face 1. Small indentations in the center of the beryllium foils are the actual lenses. The total diameter of the lens with the mounting disk is 12 mm. See text for details. |