psf_generator.propagators.spherical_propagator#

The propagator in the case of Spherical coordinates.

Classes#

SphericalPropagator

Intermediate class for propagators with spherical parameterization.

Module Contents#

class psf_generator.propagators.spherical_propagator.SphericalPropagator(n_pix_pupil=128, n_pix_psf=128, device='cpu', zernike_coefficients=None, custom_field=None, wavelength=632, na=1.3, pix_size=10, defocus_step=0, n_defocus=1, apod_factor=False, envelope=None, cos_factor=False, gibson_lanni=False, z_p=1000.0, n_s=1.3, n_g=1.5, n_g0=1.5, t_g=170000.0, t_g0=170000.0, n_i=1.5, n_i0=1.5, t_i0=100000.0, integrator=simpsons_rule)[source]#

Bases: psf_generator.propagators.propagator.Propagator, abc.ABC

Intermediate class for propagators with spherical parameterization.

Notes#

Apart from parameters inherited from the base class, there is one additional cos_factor. This cosine factor is only here to make the spherical propagator equivalent to the Cartesian propagator when sz_correction is set to False. This is useful to compute analytic low NA PSFs such as the Airy disk.
The spherical propagator makes the assumption that the input field (pupil) is axisymmetric (rotational-invariant). In other words, the input field is function of theta only and not dependent on the angle phi:

\[\mathbf{e}_{\infty}(\theta, \phi) = \mathbf{e}_{\infty}(\theta).\]