FresnelPropagator

FresnelPropagator#

class abtem.multislice.FresnelPropagator[source]#

Bases: object

The Fresnel propagator is used for propagating wave functions using the near-field approximation (Fresnel diffraction).

__init__()[source]#

Methods

__init__()

get_array(waves, thickness)

Get the Fresnel propagator as an array for the given wave functions and thickness.

propagate(waves, thickness[, in_place])

Propagate wave functions through free space.
get_array(waves, thickness)[source]#

Get the Fresnel propagator as an array for the given wave functions and thickness.

Parameters:

  • waves (Waves) – The wave functions to propagate.

  • thickness (float) – Distance in free space to propagate [Å].

Returns:

array – The Fresnel propagator as an array.

Return type:

np.ndarray

propagate(waves, thickness, in_place=False)[source]#

Propagate wave functions through free space.

Parameters:

  • waves (Waves) – The wave functions to propagate.

  • thickness (float) – Distance in free space to propagate.

  • in_place (bool) – If True, the waves are overwritten.

Returns:

propagated_wave_functions – Propagated wave functions.

Return type:

Waves

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