BAF13 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) | 1.66892 |
|---|---|
| Abbe Number (Vd) | 45.0 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.71986 - 0.00838583\,\lambda^2 + 0.0230316\,\lambda^{-2} - 1.72411 \times 10^{-5}\,\lambda^{-4} + 7.93931 \times 10^{-5}\,\lambda^{-6} - 2.41405 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 8.6 |
| 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) | 3.9 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BAH13 | Ohara | 1.668921 | 44.987354 | |
| BAF13 | Schott | 1.668919 | 44.961828 | |
| BAF13 | Hoya | 1.668916 | 44.911265 | |
| IRG11 | Generic IR | 1.680932 | 44.434326 | |
| BAF22 | Hoya | 1.682496 | 44.671672 | |
| ZBAF51 | CDGM | 1.682726 | 44.528543 | |
| BAF50 | Schott | 1.682726 | 44.503507 | |
| ATF4 | Hoya | 1.653757 | 44.723072 | |
| BAFN10 | Schott | 1.670031 | 47.108735 | |
| N-BAF10 | Schott | 1.67003 | 47.11 |