Abstract

The reflection efficiencies for the various orders of diffraction produced by a grating are calculated under the following assumptions. The grating is for the most part flat, but with a fraction of the periodicity interval a described by a profile function z=f(x). The reflection and transmission efficiencies are calculated as a series expansion in . Numerical calculations have been performed for the case of ultrasoft x rays incident at near grazing angles, using a complex index of refraction η=1−δ0λ2+0λ3.25 or tabulated values. No effects of shadowing by the grating profile have been considered, and the numerical work has been done for a symmetrical triangular trench incised in the flat surface.

© 1964 Optical Society of America

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Equations (31)

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