Monochromatic x-ray beams improve image contrast but suffer from low intensity if produced with a flat
monochromator crystal. A doubly-curved crystal makes more efficient use of the source. However, the beam shape
is not conducive to imaging. A combination of a bent crystal followed by a polycapillary optic can be used to
monochromatize and focus x rays to a small spot to perform monochromatic x-ray imaging with good resolution.
Ray-tracing simulations have been developed which account for defects in both optics types. A comparison was
made to measurements of focal spot sizes, angular divergence, and image quality parameters including resolution
and contrast. Simulations support the experimental results that geometric blur is significantly reduced, and
resolution enhanced, for magnification imaging with this optic combination.
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