Paraxial Surfaces

This example shows how paraxial surfaces can be defined in Optiland. These are defined solely based on their focal length and can be used for first order system layouts.

import numpy as np

from optiland import optic

lens = optic.Optic()

# add surfaces
lens.surfaces.add(index=0, thickness=np.inf)
lens.surfaces.add(index=1, surface_type="paraxial", thickness=100, f=100, is_stop=True)
lens.surfaces.add(index=2)

# add aperture
lens.set_aperture(aperture_type="EPD", value=20)

# add field
lens.fields.set_type(field_type="angle")
lens.fields.add(y=0)
# lens.fields.add(y=5)

# add wavelength
lens.wavelengths.add(value=0.55, is_primary=True)

lens.draw(num_rays=6)