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" and nsx>=nlx.
The radius is algebraic or infinite. Enter "infinite" for a plane surface. Object position and height are algebraic.
Positive direction is according to the sense of the horizontal arrow provided for this purpose..