TAFD9 by Hoya
Obsolete
Unknown
Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
No transmission data available.
Optical Properties
| Refractive Index (nd) | 1.850299 |
|---|---|
| Abbe Number (Vd) | 32.181026 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{3.30539 - 0.0157101\,\lambda^2 + 0.0367077\,\lambda^{-2} + 0.00236582\,\lambda^{-4} - 0.000155819\,\lambda^{-6} + 1.77229 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | — |
|---|---|
| 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 | |
|---|---|---|---|---|
| LASFN9 | Schott | 1.85025 | 32.17 | |
| N-LASF9HT | Schott | 1.85025 | 32.17 | |
| N-LASF9 | Schott | 1.85025 | 32.17 | |
| H-ZLAF71AGT | CDGM | 1.85026 | 32.216801 | |
| S-LAH71 | Ohara | 1.850259 | 32.27012 | |
| LAH71 | Ohara | 1.850259 | 32.28594 | |
| H-ZLAF71 | CDGM | 1.85026 | 32.297288 | |
| K-LaSFn21 | Sumita | 1.85 | 32.4 | |
| LASFN21 | Sumita | 1.85 | 32.4 | |
| IRG3 | Generic IR | 1.844836 | 32.330322 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| NBFD30 | Hoya | 1.85883 | 30.0 | |
| TAFD13 | Hoya | 1.855396 | 36.557002 | |
| M-NBFD83 | Hoya | 1.820268 | 29.696286 | |
| NBFD40 | Hoya | 1.829 | 36.496616 | |
| MP-NBFD10-20 | Hoya | 1.83461 | 37.29 | |
| M-NBFD10 | Hoya | 1.83441 | 37.29 | |
| NBFD10 | Hoya | 1.834 | 37.34 | |
| NBFD15 | Hoya | 1.8061 | 33.27 | |
| NBFD15-W | Hoya | 1.8061 | 33.27 | |
| MC-TAFD317 | Hoya | 1.8812 | 37.17 |