prysm.x.sri#

Self-Referenced Interferometer.

class prysm.x.sri.SelfReferencedInterferometer(x, y, efl, epd, wavelength, pinhole_diameter=0.25, pinhole_samples=128, beamsplitter_RT=(0.8, 0.2))#

Bases: object

Self-Referenced Interferometer.

Create a new Self-Referenced Interferometer.

Parameters:

  • x (numpy.ndarray) – x coordinates for arrays that will be passed to forward_model not normalized

  • y (numpy.ndarray) – y coordinates for arrays that will be passed to forward_model not normalized

  • efl (float) – focal length in the focusing space behind the grating

  • epd (float) – entrance pupil diameter, mm

  • wavelength (float) – wavelength of light, um

  • pinhole_diameter (float) – diameter of the pinhole placed at the m=0 focus

  • pinhole_samples (int) – number of samples across the pinhole placed at the m=0 focus

  • beamsplitter_RT (tuple of float) – [R]eference, [T]est arm beamsplitter transmisivities (big R / big T, power). Needed to balance ref/test beam power.

forward_model(wave_in, phase_shift=0, debug=False)#

Perform a forward model, returning the intensity at the detector plane.

Parameters:

  • wave_in (numpy.ndarray) – complex wavefunction present at the input to the interferometer

  • phase_shift (float) – phase shift, modulo 2pi, if any

  • debug (bool) – if True, returns a dict with the fields in the ref arm, before and after interacting with the interferometer components

Returns:

intensity at the camera

Return type:

prysm._richdata.RichData