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Figure 3
Advantages of parabolic lens profiles as compared with spherical ones. (a) A parabolic embossing tool generates everywhere normal forces which results in a smoother surface. (b) For a parabolic profile the geometric aperture 2 R0 and the radius of curvature, which determines the focal length, are decoupled.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 9| Part 3| April 2002| Pages 119-124
doi:10.1107/S0909049502003436
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