| Wavelength [µm] | Refractive index |
|---|---|
| 0.58 | 2.631 |
| 1.00 | 2.489 |
| 3.00 | 2.438 |
| 4.20 | 2.432 |
| 7.00 | 2.422 |
| 9.80 | 2.408 |
| 13.00 | 2.385 |
| 15.00 | 2.367 |
| 16.60 | 2.349 |
| 18.20 | 2.328 |
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