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Figure 1
(a) Sagittal cut of an X-ray lens showing its main geometrical parameters. This concave lens focuses X-rays in the y-direction if n1 > n2. (b) N-stacked lenses. A single X-ray lens refracts very weakly. To overcome this drawback – pointed out as early as the late 1940s (Kirkpatrick & Baez, 1948BB20) – lenses are usually stacked, hence `compound' in compound refractive lenses.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 2| March 2020| Pages 305-318
https://doi.org/10.1107/S1600577519017235
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