get_diffraction_pattern#
- DiffractionSimulation.get_diffraction_pattern(shape=(512, 512), sigma=10, direct_beam_position=None, in_plane_angle=0, mirrored=False)[source]#
Returns the diffraction data as a numpy array with two-dimensional Gaussians representing each diffracted peak. Should only be used for qualitative work.
- Parameters:
shape (tuple of ints) – The size of a side length (in pixels)
sigma (float) – Standard deviation of the Gaussian function to be plotted (in pixels).
direct_beam_position (2-tuple of ints, optional) – The (x,y) coordinate in pixels of the direct beam. Defaults to the center of the image.
in_plane_angle (float, optional) – In plane rotation of the pattern in degrees
mirrored (bool, optional) – Whether the pattern should be flipped over the x-axis, corresponding to the inverted orientation
- Returns:
diffraction-pattern – The simulated electron diffraction pattern, normalised.
- Return type:
numpy.array
Notes
If don’t know the exact calibration of your diffraction signal using 1e-2 produces reasonably good patterns when the lattice parameters are on the order of 0.5nm and a the default size and sigma are used.