class CookeTriplet(Optic):
"""A Cooke triplet lens design."""
def __init__(self):
super().__init__()
self.surfaces.add(index=0, radius=be.inf, thickness=be.inf)
self.surfaces.add(index=1, radius=22.01359, thickness=3.25896, material="SK16")
self.surfaces.add(index=2, radius=-435.76044, thickness=6.00755)
self.surfaces.add(index=3, radius=-22.21328, thickness=0.99997, material=("F2", "schott"))
self.surfaces.add(index=4, radius=20.29192, thickness=4.75041, is_stop=True)
self.surfaces.add(index=5, radius=79.68360, thickness=2.95208, material="SK16")
self.surfaces.add(index=6, radius=-18.39533, thickness=42.20778)
self.surfaces.add(index=7)
self.set_aperture(aperture_type="EPD", value=10)
self.fields.set_type(field_type="paraxial_image_height")
self.fields.add(y=0)
self.fields.add(y=12)
self.fields.add(y=18)
self.wavelengths.add(value=0.48)
self.wavelengths.add(value=0.55, is_primary=True)
self.wavelengths.add(value=0.65)
