BAF4 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) | 1.60562 |
|---|---|
| Abbe Number (Vd) | 43.9 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.52586 - 0.0108701\,\lambda^2 + 0.0165428\,\lambda^{-2} + 0.00115699\,\lambda^{-4} - 8.85624 \times 10^{-5}\,\lambda^{-6} + 6.10337 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 10.5 |
| 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) | 3.3 |
|---|---|
| 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 | |
|---|---|---|---|---|
| BAF5 | CDGM | 1.605623 | 43.890292 | |
| BAF4 | Hoya | 1.60562 | 43.87626 | |
| H-BAF5 | CDGM | 1.60562 | 43.875621 | |
| BAF4 | Schott | 1.605621 | 43.929699 | |
| C06-44 | Corning | 1.605608 | 43.942859 | |
| M-BAF41 | Hoya | 1.605777 | 43.98709 | |
| BAM4 | Ohara | 1.60562 | 43.723021 | |
| N-BAF4 | Schott | 1.60568 | 43.72 | |
| S-BAM4 | Ohara | 1.60562 | 43.706978 | |
| TF3 | CDGM | 1.612423 | 44.093486 |