BASF7 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) | 1.70154 |
|---|---|
| Abbe Number (Vd) | 41.1 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.82064 - 0.00977555\,\lambda^2 + 0.0251876\,\lambda^{-2} + 0.000559494\,\lambda^{-4} + 5.67124 \times 10^{-6}\,\lambda^{-6} + 2.64246 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 7.6 |
| 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) | 4.07 |
|---|---|
| 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 | |
|---|---|---|---|---|
| D01-41 | Corning | 1.701805 | 41.110216 | |
| H-ZBAF20 | CDGM | 1.70154 | 41.148468 | |
| BAFD7 | Hoya | 1.70154 | 41.15 | |
| BASF52 | Schott | 1.70181 | 41.010234 | |
| BAH77 | Ohara | 1.701539 | 41.21001 | |
| S-BAH27 | Ohara | 1.701536 | 41.23944 | |
| BAH27 | Ohara | 1.701536 | 41.242277 | |
| BAFD15 | Hoya | 1.701999 | 40.195943 | |
| BAH71 | Ohara | 1.701998 | 40.097173 | |
| BAH54 | Ohara | 1.695 | 42.167111 |