Caution
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Choose all parameters unit.
Refraction indexes can be either numeric values or references of glasses from the catalog. If references of glasses are selected, the calculation considers the refraction indexes of these glasses at the generic wavelengths lam_min and lam_max defined in the page accessible by the general parameters/wavelength link.
If nsx and nlx are numeric values, they are larger than or equal to "1" (ns1 and nl1 are strictly larger than "1") and nsx>=nlx.
e is strictly positive.
Radii are algebraic or infinite. Enter "infinite" for a plane surface. The object height is algebraic (it is defined by an angle as the object is at infinity).
Positive direction and angle positive way are according to the arrows provided for this purpose.