TAFD31 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) | 1.922501 |
|---|---|
| Abbe Number (Vd) | 35.946005 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{3.5689 - 0.0131231\,\lambda^2 + 0.0416524\,\lambda^{-2} + 0.00135161\,\lambda^{-4} - 3.68628 \times 10^{-5}\,\lambda^{-6} + 7.7959 \times 10^{-6}\,\lambda^{-8}}$$
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 | |
|---|---|---|---|---|
| CAWO4 | Generic Birefringent | 1.920414 | 34.953592 | |
| H-ZLAF4LB | CDGM | 1.91082 | 35.282389 | |
| K-LaSFn23 | Sumita | 1.911 | 35.2 | |
| H-ZLAF4LA | CDGM | 1.91082 | 35.25034 | |
| S-LAH93 | Ohara | 1.90525 | 35.036826 | |
| H-ZLAF78B | CDGM | 1.90069 | 37.050531 | |
| CAWO4-E | Generic Birefringent | 1.937211 | 33.304949 | |
| LASF18A | Schott | 1.913482 | 32.364492 | |
| LASFN22 | Sumita | 1.898 | 34.0 | |
| K-LaSFn22 | Sumita | 1.898 | 34.0 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| TAFD35 | Hoya | 1.91082 | 35.25 | |
| TAFD35L | Hoya | 1.91082 | 35.25 | |
| TAFD37A | Hoya | 1.90043 | 37.37 | |
| TAFD37 | Hoya | 1.90043 | 37.37 | |
| TAFD25L | Hoya | 1.90366 | 31.32 | |
| TAFD25 | Hoya | 1.90366 | 31.32 | |
| TAFD45L | Hoya | 1.95375 | 32.32 | |
| TAFD45 | Hoya | 1.95375 | 32.32 | |
| MC-TAFD307 | Hoya | 1.88202 | 37.22 | |
| MP-TAFD307 | Hoya | 1.88202 | 37.22 |