# Optical constants of water
#  wavelen.  ext. fact.   index of refr.
#  λ(nm)      k           n
const WATERCONST =
[   200     1.10e-7     1.396;
    225     4.90e-8     1.373;
    250     3.35e-8     1.362;
    275     2.35e-8     1.354;
    300     1.60e-8     1.349;
    325     1.08e-8     1.346;
    350     6.50e-9     1.343;
    375     3.50e-9     1.341;
    400     1.86e-9     1.339;
    425     1.30e-9     1.338;
    450     1.02e-9     1.337;
    475     9.35e-10    1.336;
    500     1.00e-9     1.335;
    525     1.32e-9     1.334;
    550     1.96e-9     1.333;
    575     3.60e-9     1.333;
    600     1.09e-8     1.332;
    625     1.39e-8     1.332;
    650     1.64e-8     1.331;
    675     2.23e-8     1.331;
    700     3.35e-8     1.331;
    725     9.15e-8     1.330;
    750     1.56e-7     1.330;
    775     1.48e-7     1.330;
    800     1.25e-7     1.329;
    825     1.82e-7     1.329;
    850     2.93e-7     1.329;
    875     3.91e-7     1.328;
    900     4.86e-7     1.328;
    925     1.06e-6     1.328;
    950     2.93e-6     1.327;
    975     3.48e-6     1.327;
   1000     2.89e-6     1.327;
   1200     9.89e-6     1.324;
   1400     1.38e-4     1.321;
   1600     8.55e-5     1.317;
   1800     1.15e-4     1.312;
   2000     1.10e-3     1.306;
   2200     2.89e-4     1.296;
   2400     9.56e-4     1.279;
   2600     3.17e-3     1.242;
   2650     6.70e-3     1.219;
   2700     0.01900     1.188;
   2750     0.05900     1.157;
   2800     0.11500     1.142;
   2850     0.18500     1.149;
   2900     0.26800     1.201;
   2950     0.29800     1.292;
   3000     0.27200     1.371;
   3050     0.24000     1.426;
   3100     0.19200     1.467;
   3150     0.13500     1.483;
   3200     0.09240     1.478;
   3250     0.06100     1.467;
   3300     0.03680     1.450;
   3350     0.02610     1.432;
   3400     0.01950     1.420;
   3450     0.01320     1.410;
   3500     0.00940     1.400;
   3600     0.00515     1.385;
   3700     0.00360     1.374;
   3800     0.00340     1.364;
   3900     0.00380     1.357;
   4000     0.00460     1.351;
   4100     0.00562     1.346;
   4200     0.00688     1.342;
   4300     0.00845     1.338;
   4400     0.01030     1.334;
   4500     0.01340     1.332;
   4600     0.01470     1.330;
   4700     0.01570     1.330;
   4800     0.01500     1.330;
   4900     0.01370     1.328;
   5000     0.01240     1.325;
   5100     0.01110     1.322;
   5200     0.01010     1.317;
   5300     0.00980     1.312;
   5400     0.01030     1.305;
   5500     0.01160     1.298;
   5600     0.01420     1.289;
   5700     0.02030     1.277;
   5800     0.03300     1.262;
   5900     0.06220     1.248;
   6000     0.10700     1.265;
   6100     0.13100     1.319;
   6200     0.08800     1.363;
   6300     0.05700     1.357;
   6400     0.04490     1.347;
   6500     0.03920     1.339;
   6600     0.03560     1.334;
   6700     0.03370     1.329;
   6800     0.03270     1.324;
   6900     0.03220     1.321;
   7000     0.03200     1.317;
   7100     0.03200     1.314;
   7200     0.03210     1.312;
   7300     0.03220     1.309;
   7400     0.03240     1.307;
   7500     0.03260     1.304;
   7600     0.03280     1.302;
   7700     0.03310     1.299;
   7800     0.03350     1.297;
   7900     0.03390     1.294;
   8000     0.03430     1.291;
   8200     0.03510     1.286;
   8400     0.03610     1.281;
   8600     0.03720     1.275;
   8800     0.03850     1.269;
   9000     0.03990     1.262;
   9200     0.04150     1.255;
   9400     0.04330     1.247;
   9600     0.04540     1.239;
   9800     0.04790     1.229;
  10000     0.05080     1.218;
  10500     0.06620     1.185;
  11000     0.09680     1.153;
  11500     0.14200     1.126;
  12000     0.19900     1.111;
  12500     0.25900     1.123;
  13000     0.30500     1.146;
  13500     0.34300     1.177;
  14000     0.37000     1.210;
  14500     0.38800     1.241;
  15000     0.40200     1.270;
  15500     0.41400     1.297;
  16000     0.42200     1.325;
  16500     0.42800     1.351;
  17000     0.42900     1.376;
  17500     0.42900     1.401;
  18000     0.42600     1.423;
  18500     0.42100     1.443;
  19000     0.41400     1.461;
  19500     0.40400     1.476;
  20000     0.39300     1.480;
  21000     0.38200     1.487;
  22000     0.37300     1.500;
  23000     0.36700     1.511;
  24000     0.36100     1.521;
  25000     0.35600     1.531;
  26000     0.35000     1.539;
  27000     0.34400     1.545;
  28000     0.33800     1.549;
  29000     0.33300     1.551;
  30000     0.32800     1.551;
  32000     0.32400     1.546;
  34000     0.32900     1.536;
  36000     0.34300     1.527;
  38000     0.36100     1.522;
  40000     0.38500     1.519;
  42000     0.40900     1.522;
  44000     0.43600     1.530;
  46000     0.46200     1.541;
  48000     0.48800     1.555;
  50000     0.51400     1.587;
  60000     0.58700     1.703;
  70000     0.57600     1.821;
  80000     0.54700     1.886;
  90000     0.53600     1.924;
 100000     0.53200     1.957;
 110000     0.53100     1.966;
 120000     0.52600     2.004;
 130000     0.51400     2.036;
 140000     0.50000     2.056;
 150000     0.49500     2.069;
 160000     0.49600     2.081;
 170000     0.49700     2.094;
 180000     0.49900     2.107;
 190000     0.50100     2.119;
 200000     0.50400     2.130]