1 BK7 Glass data from SCHOTT literature, plus fit k from T data
\r
4 250 1.5537 2.3171e-05
\r
5 260 1.5522 2.6453e-05
\r
6 270 1.5507 3.0863e-05
\r
7 280 1.5491 2.3689e-05
\r
8 290 1.5476 1.0293e-05
\r
9 300 1.5461 4.4082e-06
\r
10 310 1.5446 1.9607e-06
\r
11 320 1.5431 9.9918e-07
\r
12 330 1.5416 6.1727e-07
\r
13 340 1.5401 4.0505e-07
\r
14 350 1.5385 2.3401e-07
\r
16 370 1.5355 5.6965e-08
\r
17 380 1.534 2.4864e-09
\r