finesse.components.lens.AstigmaticLens

Overview

class finesse.components.lens.AstigmaticLens(*args, **kwargs)

Bases: BaseLens

Represents a thin astigmatic lens optical component with an associated focal lengths.

Parameters:

namestr

Name of newly created lens.

fxfloat, optional

Focal length in x-z plane of the lens in metres; defaults to infinity.

fyfloat, optional

Focal length of y-z plane the lens in metres; defaults to infinity.

Attributes:

OPD_mapfinesse.knm.Map

A map that is used to describe the transverse spatial amplitude and phase variations beyond a simple lensing. Typically the map applied is describing the dnr/dT temperature effects in some substrate.

Notes

The specified focal length f is only accurate when the lens is attached to spaces with index of refraction close to 1. This component exists so that one can use the intuitive focal length parameter instead of having to set radii of curvature as with e.g. Mirror.