Schott LaF N7, 365nm - 2325nm
USER
2 1
SQRT(1+B1*wvl^2/(wvl^2-C1)+B2*wvl^2/(wvl^2-C2)+B3*wvl^2/(wvl^2-C3))
0
B1	1.66842615E+00;
B2	2.98512803E-01;
B3	1.07743760E+00;
C1	1.03159999E-02;
C2	4.69216348E-02;
C3	8.25078509E+01;