INFRASIL by Heraeus
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Environmentally Friendly
INFRASIL by Heraeus is an optical glass. It transmits from 0.20 to 3.50 µm with an nd of 1.458563 and a Vd of 67.664757. It has very low thermal expansion (CTE of 0.51×10⁻⁶/K).
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
No transmission data available.
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 1.458563 |
|---|---|
| Abbe Number (Vd) | 67.664757 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.20254 — 3.5 µm |
$$n(\lambda) = \sqrt{1 + \frac{0.476523\,\lambda^2}{\lambda^2 - 0.00284888} + \frac{0.627786\,\lambda^2}{\lambda^2 - 0.0118369} + \frac{0.872274\,\lambda^2}{\lambda^2 - 95.6856}}$$
Thermal Properties
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| C79-80 | Corning | 1.458467 | 67.795012 | |
| F_SILICA | Generic IR | 1.458464 | 67.821433 | |
| LITHOSIL-Q | Schott | 1.45844 | 67.83 | |
| SK-1300 | Ohara | 1.458567 | 67.837244 | |
| SK-1310 | Ohara | 1.458663 | 67.854535 | |
| H-QK1 | CDGM | 1.47047 | 66.876032 | |
| KDP-E | Generic Birefringent | 1.468324 | 68.984949 | |
| FSL3 | Ohara | 1.464499 | 65.938855 | |
| FC1 | Hoya | 1.470787 | 66.706713 | |
| FK3 | Schott | 1.4645 | 65.77 |