Figure 8
Simulation of vertical focusing using a single-element refractive lens at p = 47 m from the source. The diamond source size and divergence have been used, i.e. σy = 7 µm and σz′ = 8 µrad. The figures show the intensity distribution at the focal plane given under the same illumination conditions, using Cartesian oval (red), elliptic (blue) and parabolic (green) lenses. The following cases are presented: (a) lens–image distance q = 30 cm, lens diameter h = 0.3 mm, (b) q = 30 cm, h = 0.5 mm, (c) q = 10 cm, h = 0.3 mm, and (d) q = 10 cm, h = 0.4 mm. |