BAF9 by Sumita
Obsolete
Very Rare
Environmentally Dangerous
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) | 1.64328 |
|---|---|
| Abbe Number (Vd) | 47.8 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.64406 - 0.00930061\,\lambda^2 + 0.0193046\,\lambda^{-2} + 0.000415076\,\lambda^{-4} + 1.69184 \times 10^{-6}\,\lambda^{-6} + 1.37843 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 8.3 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.77 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BAM9 | Ohara | 1.643279 | 47.850606 | |
| BAF9 | Hoya | 1.643278 | 47.941673 | |
| BAF9 | Schott | 1.643276 | 47.958224 | |
| ZBAF2 | CDGM | 1.639616 | 48.230454 | |
| C48-46 | Corning | 1.647747 | 46.227993 | |
| CALCITE | Generic IR | 1.658643 | 48.541403 | |
| CALCITE | Generic Birefringent | 1.658643 | 48.541403 | |
| BAM8 | Ohara | 1.62374 | 47.09722 | |
| C24-47 | Corning | 1.624 | 46.940278 | |
| BAF8 | Hoya | 1.623739 | 47.054197 |