BAH28 by Ohara
Obsolete
Unknown
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) | 37.949115 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.365 — 0.9 µm |
$$n(\lambda) = \sqrt{2.8917 - 0.012848\,\lambda^2 + 0.0245054\,\lambda^{-2} + 0.00167412\,\lambda^{-4} - 0.000117616\,\lambda^{-6} + 1.0469 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.4 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.4 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.3519 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.95 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BAFD8 | Hoya | 1.72342 | 37.99 | |
| H-ZBAF21 | CDGM | 1.72341 | 37.991564 | |
| D23-38 | Corning | 1.72349 | 37.995089 | |
| BASF8 | Sumita | 1.72342 | 38.0 | |
| BASF51 | Schott | 1.723728 | 38.111094 | |
| ZNSF8 | Sumita | 1.7143 | 38.9 | |
| K-ZnSF8 | Sumita | 1.7143 | 38.9 | |
| K-ZnSF8(M) | Sumita | 1.71143 | 38.9 | |
| D-LAF79-25 | CDGM | 1.72986 | 40.497566 | |
| MP-LAF81 | Hoya | 1.73077 | 40.5 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| S-BAH28 | Ohara | 1.72342 | 37.955602 | |
| BAH78 | Ohara | 1.723421 | 38.03427 | |
| L-LAM69 | Ohara | 1.73077 | 40.508156 | |
| BPH8 | Ohara | 1.720467 | 34.716156 | |
| S-NBH8 | Ohara | 1.720467 | 34.707984 | |
| BAH71 | Ohara | 1.701998 | 40.097173 | |
| S-LAM58 | Ohara | 1.72 | 41.978463 | |
| LAM58 | Ohara | 1.72 | 41.989859 | |
| S-NBH51 | Ohara | 1.749504 | 35.33248 | |
| BAH77 | Ohara | 1.701539 | 41.21001 |