K-BaF8 by Sumita
Standard
Rare
Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 1.62374 |
|---|---|
| Abbe Number (Vd) | 47.1 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{2.58306 - 0.0113197\,\lambda^2 + 0.0188175\,\lambda^{-2} + 0.000270633\,\lambda^{-4} + 2.15276 \times 10^{-5}\,\lambda^{-6} + 7.77619 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.7 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.8 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[7.3 \times 10^{-7} + 2(1.78 \times 10^{-8})\,\Delta T + 3(-2.34 \times 10^{-10})\,\Delta T^2 + \frac{5.81 \times 10^{-7} + 2(1.81 \times 10^{-11})\,\Delta T}{\lambda - 0.234}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.02 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 3 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BAM8 | Ohara | 1.62374 | 47.09722 | |
| BAF8 | Hoya | 1.623739 | 47.054197 | |
| E-BAF8 | Hoya | 1.62374 | 47.05 | |
| BAF8 | Schott | 1.62374 | 47.000909 | |
| C24-47 | Corning | 1.624 | 46.940278 | |
| N-BAF52 | Schott | 1.60863 | 46.6 | |
| BAF52 | Schott | 1.608589 | 46.44241 | |
| BAF7 | Hoya | 1.608013 | 46.212035 | |
| H-BAF6 | CDGM | 1.60801 | 46.202418 | |
| ZBAF2 | CDGM | 1.639616 | 48.230454 |