transfer#
Module to describe the contrast transfer function (CTF) and the related apertures.
Functions
|
Convert between Cartesian and polar aberration coefficients. |
|
Calculates an array with a disk of ones and a soft edge. |
|
Calculate the Nyquist sampling. |
|
Calculate the Scherzer point resolution. |
|
Convert between polar and Cartesian aberration coefficients. |
|
Calculate the Scherzer defocus. |
|
Calculates an array with a disk of ones and a soft edge. |
Classes
|
Phase aberrations. |
|
A circular aperture cutting off the wave function at a specified angle, employed in both STEM and HRTEM. |
|
Base class for apertures. |
|
Base class for transfer functions. |
|
Bullseye aperture. |
|
The contrast transfer function (CTF) describes the aberrations of the objective lens in HRTEM and specifies how the condenser system shapes the probe in STEM. |
|
Envelope function for simulating partial spatial coherence in the quasi-coherent approximation. |
|
Envelope function for simulating partial temporal coherence in the quasi-coherent approximation. |
|
Vortex-beam aperture. |
|
Zernike aperture. |