BASF8 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) | 1.72342 |
|---|---|
| Abbe Number (Vd) | 38.0 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.8897 - 0.0120818\,\lambda^2 + 0.0256638\,\lambda^{-2} + 0.00143039\,\lambda^{-4} - 9.4809 \times 10^{-5}\,\lambda^{-6} + 8.75721 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 7.4 |
| 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) | 4.24 |
|---|---|
| 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 | |
|---|---|---|---|---|
| H-ZBAF21 | CDGM | 1.72341 | 37.991564 | |
| BAFD8 | Hoya | 1.72342 | 37.99 | |
| D23-38 | Corning | 1.72349 | 37.995089 | |
| BAH78 | Ohara | 1.723421 | 38.03427 | |
| S-BAH28 | Ohara | 1.72342 | 37.955602 | |
| BAH28 | Ohara | 1.72342 | 37.949115 | |
| BASF51 | Schott | 1.723728 | 38.111094 | |
| D-LAF79-25 | CDGM | 1.72986 | 40.497566 | |
| MP-LAF81 | Hoya | 1.73077 | 40.5 | |
| M-LAF81 | Hoya | 1.73077 | 40.5 |