rayoptics.oprops.thinlens module

Module for thin lens interface type

class ThinLens(lbl='', power=0.0, ref_index=1.5, center_wvl=550.0, **kwargs)

Bases: Interface

list_thinlens()

listobj_str()

ifc_token()

update()

full_profile(sd, flat_id=None, dir=1, steps=6)

property profile_cv

surface_od()

set_max_aperture(max_ap)

max_ap is the max aperture radius

property optical_power

set_optical_power(pwr, n_before, n_after)

apply_scale_factor(scale_factor)

update_following_reflection()

Notification that incident light is following reflection.

from_first_order(nu_before, nu_after, y)

normal(p)

Returns the unit normal of the interface at point p.

intersect(p0, d, **kwargs)

Intersect an Interface, starting from an arbitrary point.

Parameters:

• p0 – start point of the ray in the interface’s coordinate system

• d – direction cosine of the ray in the interface’s coordinate system

• z_dir – +1 if propagation positive direction, -1 if otherwise

• eps – numeric tolerance for convergence of any iterative procedure

Returns:

distance to intersection point s1, intersection point p

Return type:

tuple

Raises:

TraceMissedSurfaceError –

phase(pt, d_in, normal, ifc_cntxt)

Returns a diffracted ray direction and phase increment.

Parameters:

• pt – point of incidence in Interface coordinates

• in_dir – direction cosine of incident ray

• srf_nrml – Interface surface normal at pt

• ifc_cntxt –

  a tuple containing

  z_dir: -1 if after an odd # of reflections, +1 otherwise wl: wavelength in nm for ray, defaults to ref_wl n_in: refractive index preceding the interface n_out: refractive index following the interface interact_mode: ‘transmit’ or ‘reflect’

Returns:

(out_dir, dW)

• out_dir: direction cosine of the out going ray

• dW: phase added by diffractive interaction