Schott LaSF N15, 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	2.08894974E+00;
B2	3.27776152E-01;
B3	1.52128728E+00;
C1	1.09012831E-02;
C2	4.35007930E-02;
C3	1.01183881E+02;