At-wavelength characterization of refractive x-ray lenses using a two-dimensional grating interferometer
نویسندگان
چکیده
We report on the application of a two-dimensional hard x-ray grating interferometer to x-ray optics metrology. The interferometer is sensitive to refraction angles in two perpendicular directions with a precision of 10 nrad. It is used to observe the wavefront changes induced by a single parabolic beryllium focusing lens of large radius of curvature. The lens shape is reconstructed and its residual aberrations are analyzed. Its profile differs from an ideal parabolic shape by less than 2 lm or k/50 at k1⁄4 0.54 Å wavelength. VC 2011 American Institute of Physics. [doi:10.1063/1.3665063]
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تاریخ انتشار 2011