TiltOpticalPathDifference

class poppy.TiltOpticalPathDifference(name='Tilt', tilt_angle=<Quantity 0.1 arcsec>, rotation=0, **kwargs)

Bases: AnalyticOpticalElement

A simple tilt in OPD.

With the sign convention used in poppy, a wavefront that is positively increasing in the +X direction will deflect the beam in the -X direction, and so on.

Parameters:

tilt_angleastropy Quantity angle

Angle of the tilt; any angular astropy Quantity (arcsec, radians, degrees, etc.) is accepted. Default is 0.1 arcsec.

rotationfloat, optional

Position angle in degrees counterclockwise for the direction in which the beam should be tilted. Inherited from AnalyticOpticalElement. Default is 0.

namestring, optional

Descriptive name. Default is ‘Tilt’.

Methods Summary

get_opd(wave)

Return the optical path difference, given a wavelength.

Methods Documentation

get_opd(wave)

Return the optical path difference, given a wavelength.

In this base class instance, the wavefront parameter ‘wave’ is not used,

and the .opd attribute of the optic is returned directly. Subclasses may change this behavior, for instance to evaluate optical aberrations on the sampling defined for that wavefront, or to compute the wavelength-dependent aberrations of a refractive optic.

Parameters:

wavefloat or obj

either a scalar wavelength or a Wavefront object

Returns:

ndarray giving OPD in meters