KnifeEdgeLyotCoronagraph
- class hcipy.coronagraphy.KnifeEdgeLyotCoronagraph(input_grid, q=8, direction='+x', apodizer=None, lyot_stop=None)
Bases:
OpticalElementA Lyot-style coronagraph with a centered, knife-edge focal-plane mask.
As the knife-edge is invariant along one axis, the Fourier transforms can be sped up by only taking them along one axis. Also, the zero-padding only needs to be done along that axis, reducing memory usage while doing the transform.
The knife-edge is set along the y-axis, so perpendicular to the x-axis.
- Parameters
- input_gridGrid
The grid of the wavefront that is to be propagated.
- qscalar
The amount of oversampling used for the knife edge.
- directionstring
The direction of the transmissive part of the knife edge. This has to be one of {‘+x’, ‘-x’, ‘+y’, ‘-y’}.
- apodizerOpticalElement or Field or None
The pre-apodizer in the pupil before the focal-plane mask. If this is a Field, it will be converted into an apodizer. If this is None, no apodizer will be used.
- lyot_maskOpticalElement or Field
The Lyot stop in the pupil after the focal-plane mask. If this is a Field, it will be converted to an apodizer. If this is None, no Lyot stop will be used.
Methods Summary
backward(wavefront)Propagate a wavefront backward through the knife-edge coronagraph.
forward(wavefront)Propagate a wavefront forward through the knife-edge coronagraph.
Methods Documentation
- backward(wavefront)
Propagate a wavefront backward through the knife-edge coronagraph.
- Parameters
- wavefrontWavefront
The wavefront to propagate.
- Returns
- Wavefront
The propagated wavefront.
- forward(wavefront)
Propagate a wavefront forward through the knife-edge coronagraph.
- Parameters
- wavefrontWavefront
The wavefront to propagate.
- Returns
- Wavefront
The propagated wavefront.