Fourier synthesis

"Fourier synthesis" is a method that adds the phase to the amplitude of diffraction spots and takes the sum of many reflections in crystal structure analysis. This method enables us to obtain the electron density in a real space in X-ray diffraction, and also in electron diffraction where kinematical diffraction can be applied (for example, for biological specimens such as proteins), we can obtain the electron density from the same method. Furthermore, in the structure analysis using electron diffraction, Fourier synthesis enables us to obtain the crystal potential distribution. Finding the crystal potential allows the electron density to be mathematically obtained. In the case of specimens in material science applications, the structure analysis is performed by CBED since these specimens have strong dynamical effects.

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