An optical crystal (a multilayer diffraction plate) which optically simulates electron diffraction by thin crystals has been developed. The lattice was constructed with appropriate lattice constants to allow a direct optical simulation of electron diffraction by mica. The resulting optical-diffraction patterns agree with theory and vividly illustrate Laue zones. Optical-diffraction patterns for different crystal orientations are directly compared to electron-diffraction patterns for the same orientations of a thin mica crystal. The breadths of Laue zones diminish as a crystal becomes thicker, reducing the diffraction pattern to the Laue spots described by Bragg’s law.
Ronald Bergsten, "Optical simulation of electron diffraction of thin crystals," J. Opt. Soc. Am. 64, 1309-1312 (1974)