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Figure 3
General schematic of diffraction from a periodic structure for a wavefield with two orthogonal field components for an arbitrary angle of incidence and polarization. The TE component of the incident wavefield is considered to be in the plane of incidence, while the TM component is orthogonal to it. The polarization angle δ refers to the inclination angle of the polarization vector with respect to the TE plane for the incident beam. The polar orientation angle φ is connected to the azimuthal grazing incidence angle γ via φ = π/2 − γ. For the case of conical diffraction γ is used in equation (10)[link] and defined in Fig. 2[link].

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 25| Part 6| November 2018| Pages 1683-1693
https://doi.org/10.1107/S1600577518012419
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