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Figure 2
Lenses based on the material removal strategy presented in Fig. 1(c)[link] obtained by re-arranging the remaining material. While in (a) and (b) the parabolic curvature is maintained in the outermost and in the innermost segment surfaces of any row, the lens in (c) is composed of perfect prisms. In the lens in (d) the lens from (c) was made more rigid by adding stiffening bars on the prism symmetry axis. (e) Micrograph of a Fresnel lens realised according to the scheme in (b). The inset shows details in the center of a lens of type (d). The prisms have a height of 25.67 µm and a width of 73.33 µm. The overall lens height is 1.5 mm and contains 58 prism rows.

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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