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Caution
Except wavelength, all the numerical parameters ( refraction indexes and constringences) are larger than "1". Note that constringences are in practice much larger than "1".
wavelength is defined in microns and is obviously strictly positive.
It is possible to leave cells empty. The related criterions are then not taken into account.
The manufacturers may specify refractive indexes at different temperatures. Indeed, this temperature is 20° for SCHOTT, CGPM glasses and 25° for OHARA ones. It is either or for HOYA glasses and not specified for Generic and Theoretical ones. Note that the temperature coefficients are not available for all glasses. The lst is displayed in the tutorial. That may introduce some errors as the when the temperature is different from 20°.
