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Figure 1
Cross section of transmission lenses for X-rays. (a) Bi-concave lens with parabolic surfaces. The lens in (b) is obtained from (a) by removing as many blocks of material as possible, which shifts the phase of the transmitted radiation by integer multiples of 2π. In the lens in (c) the same strategy is applied; however, now also the height of the blocks is kept constant. The cross section in (d) shows three prism pairs, obtained by inclining two dented plates with respect to each other. All objects are drawn to scale with the same focal length.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 15| Part 2| February 2008| Pages 176-184
doi:10.1107/S090904950800068X
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