[2] Dhez P, Erko A, Khzmalian E et al.. Kirkpatrick-Baez microscope based on a Bragg-Fresnel X-ray multilayer focusing system. Appl. Opt., 1992, 31(31):6622~6667
[3] Barbee T W, Jr.. Combined microstructure X-ray optics (invited). Rev. Sci. Instrum., 1989, 60(7):1588~1595
[4] Sammar A, Andre J M. Integral calculation method of efficiencies of laminar stratified gratings. Opt. Commun., 1998, 149(4):348~354