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Common Substrates
Crown
Glass (BK7)
Wavelength, nm |
Index |
365.0 |
1.536 |
404.7 |
1.530 |
480.0 |
1.523 |
546.1 |
1.519 |
550.0 |
1.519 |
632.8 |
1.515 |
852.1 |
1.510 |
1064.0 |
1.506 |
1529.6 |
1.501 |
1970.1 |
1.495 |
2325.4 |
1.489 |
Fused
Silica (UV Grade)
Wavelength, nm |
Index |
2000 |
1.438 |
Pyrex
Wavelength, nm |
Index |
589.3 |
1.473 |
Soda
Lime Glass
Wavelength, nm |
Index |
435.0 |
1.523 |
645.0 |
1.513 |
Polycarbonate (Lexan)
Wavelength, nm |
Index |
365.0 |
1.643 |
404.6 |
1.622 |
435.8 |
1.612 |
479.9 |
1.601 |
486.1 |
1.599 |
546.1 |
1.590 |
550.0 |
1.590 |
587.5 |
1.585 |
589.3 |
1.585 |
643.8 |
1.581 |
656.3 |
1.579 |
706.5 |
1.577 |
852.1 |
1.571 |
1013.9 |
1.567 |
Acrylic
Wavelength, nm |
Index |
365.0 |
1.514 |
404.6 |
1.507 |
435.8 |
1.503 |
479.9 |
1.498 |
486.1 |
1.498 |
546.1 |
1.494 |
550.0 |
1.494 |
587.5 |
1.492 |
589.3 |
1.492 |
643.8 |
1.489 |
656.3 |
1.489 |
706.5 |
1.487 |
852.1 |
1.484 |
1013.9 |
1.483 |
Sapphire
Wavelength, nm |
Index |
263.8 |
1.834 |
281.8 |
1.823 |
295.2 |
1.817 |
310.0 |
1.810 |
335.1 |
1.801 |
354.4 |
1.796 |
400.0 |
1.787 |
539.1 |
1.771 |
550.0 |
1.770 |
652.6 |
1.765 |
775.0 |
1.761 |
885.7 |
1.758 |
1033.0 |
1.755 |
1127.0 |
1.753 |
1771.0 |
1.742 |
2057.0 |
1.736 |
2564.0 |
1.723 |
2703.0 |
1.719 |
2941.0 |
1.712 |
3333.0 |
1.701 |
4000.0 |
1.674 |
Germanium
Wavelength, nm |
Index |
2058.1 |
4.102 |
4258.0 |
4.022 |
6238.0 |
4.009 |
8660.0 |
4.004 |
10000.0 |
4.003 |
11040.0 |
4.003 |
13020.0 |
4.002 |
Silicon
Wavelength, nm |
Index |
1357.0 |
3.498 |
2152.6 |
3.448 |
3000.0 |
3.432 |
4000.0 |
3.426 |
5000.0 |
3.422 |
6000.0 |
3.420 |
7000.0 |
3.419 |
8000.0 |
3.418 |
10000.0 |
3.418 |
Gallium
Arsenide
Wavelength, nm |
Index |
4000.0 |
3.307 |
10000.0 |
3.278 |
14000.0 |
3.251 |
Zinc
Sulfide
Wavelength, nm |
Index |
1000.0 |
2.292 |
3000.0 |
2.257 |
5000.0 |
2.246 |
7000.0 |
2.232 |
9000.0 |
2.212 |
10000.0 |
2.199 |
11000.0 |
2.186 |
13000.0 |
2.152 |
15000.0 |
2.106 |
17000.0 |
2.045 |
Zinc
Selenide
Wavelength, nm |
Index |
1000.0 |
2.489 |
3000.0 |
2.438 |
5000.0 |
2.430 |
7000.0 |
2.422 |
9000.0 |
2.412 |
10000.0 |
2.406 |
11000.0 |
2.400 |
13000.0 |
2.385 |
15000.0 |
2.367 |
17000.0 |
2.344 |
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