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. 2013 Nov 2;21(Pt 1):5–15. doi: 10.1107/S1600577513023850

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© Singer and Vartanyants 2014

This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

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The propagation geometry. The partially coherent source with a source size σ and coherence length ξ is positioned at . Partially coherent radiation with the beam size , coherence length and radius of curvature is incident on the lens at . The beam size and the radius of curvature are modified by the transmission through the lens. The beam is focused at the focal position with the focus size and coherence length ξ_F. The beam parameters at an arbitrary position downstream of the lens are determined.

Inline graphic — The propagation geometry. The partially coherent source with a source size σ and coherence length ξ is positioned at . Partially coherent radiation with the beam size , coherence length and radius of curvature is incident on the lens at . The beam size and the radius of curvature are modified by the transmission through the lens. The beam is focused at the focal position with the focus size and coherence length ξ_F. The beam parameters at an arbitrary position downstream of the lens are determined.