#Sapphire Prism #2 #nm Transmittance 160.8 0.261 170 0.386 180 0.441 190 0.558 195 0.571 200 0.578 205 0.586 210 0.585 215 0.590 220 0.595 225 0.613 230 0.626 240 0.668 250 0.709 275 0.779 300 0.779 325 0.819 350 0.882 375 0.919 400 0.928