--- /dev/null
+Schott Sk4, 334nm - 2325nm\r
+USER\r
+2 1\r
+SQRT(1+B1*wvl^2/(wvl^2-C1)+B2*wvl^2/(wvl^2-C2)+B3*wvl^2/(wvl^2-C3))\r
+0\r
+B1 1.39388834E+00;\r
+B2 1.64510721E-01;\r
+B3 9.63522479E-01;\r
+C1 7.69147355E-03;\r
+C2 2.71946227E-02;\r
+C3 9.92757639E+01;
\ No newline at end of file