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![[Figure 2]](mo5314fig2mag.jpg)
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Figure 2
Schematic diagrams of several diaboloids. A general diaboloid has separate source and image distances for the tangential and sagittal line foci. A tangentially collimating diaboloid is formed by letting the tangential and sagittal source distances coincide, in which case the source coalesces into a point, and by letting the tangential image distance go to infinity. A sagittal focusing diaboloid is formed in a similar manner except the sagittal image distance is set to infinity. Note that the tangential direction is parallel to the plane of incidence defined by the main incident and reflected rays (black lines) in the diagrams; the sagittal direction is perpendicular to the plane of incidence. |
![[Figure 2]](mo5314fig2.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
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