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Calculates the axial and the height chromatisms of a real lens interfacing different media for an object at infinity as functions of the refraction indexes, the surfaces radii, the center thickness and the object height (defined by an angle as the object is at infinity).

When glass references are used instead of refraction index values, the chromatism is calculated using the chosen glass references and in the spectral range going from lam_min to lam_max. lam_min and lam_max are defined in the page General parameters/Wavelengths.