Figure 4
(a) Example of the central portion of the numerically designed kinoform lens, whose pattern is used for lithography. (b) The diamond kinoform lens (E = 11.3 keV, f = 0.2 m) used to obtain the focusing images. There is no mask owing to limitations in selectivity. (c) `Edge-on' view of the central portion of a 7.4 keV lens from the perspective of the incoming X-rays, detailing a good verticality and relatively low `diamond grass'. |