TAF48 by Hoya
Preferred
Very Common
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) | 1.79091 |
|---|---|
| Abbe Number (Vd) | 48.09 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{3.13308 - 0.014211\,\lambda^2 + 0.0256426\,\lambda^{-2} + 0.000600755\,\lambda^{-4} - 9.86586 \times 10^{-6}\,\lambda^{-6} + 1.33518 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.6 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.43 \times 10^{-6} + 2(8.67 \times 10^{-9})\,\Delta T + 3(-4.23 \times 10^{-11})\,\Delta T^2 + \frac{7.49 \times 10^{-7} + 2(5.44 \times 10^{-10})\,\Delta T}{\lambda - 0.108}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.39 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 2 |
| Acid Resistance | 3 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Recommended glass type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAFN21 | Schott | 1.788309 | 47.470398 | |
| H-LAF10LA | CDGM | 1.788 | 47.491731 | |
| N-LAF21 | Schott | 1.788 | 47.49 | |
| K-LaSFn16 | Sumita | 1.7883 | 47.4 | |
| LASFN16 | Sumita | 1.7883 | 47.4 | |
| D88-47 | Corning | 1.788001 | 47.412327 | |
| LAH64 | Ohara | 1.788001 | 47.385275 | |
| S-LAH64 | Ohara | 1.788001 | 47.368522 | |
| YGH52 | Ohara | 1.7865 | 50.001717 | |
| S-YGH52 | Ohara | 1.7865 | 50.001717 |