TAFD5F by Hoya
Special
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) | 1.83481 |
|---|---|
| Abbe Number (Vd) | 42.72 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{3.27555 - 0.0144704\,\lambda^2 + 0.0309221\,\lambda^{-2} + 0.0007329\,\lambda^{-4} + 4.65733 \times 10^{-6}\,\lambda^{-6} + 1.82427 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.2 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.8 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.79 \times 10^{-6} + 2(8.81 \times 10^{-9})\,\Delta T + 3(-2.5 \times 10^{-11})\,\Delta T^2 + \frac{7.25 \times 10^{-7} + 2(7.24 \times 10^{-10})\,\Delta T}{\lambda - 0.197}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.72 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | 1 |
| Acid Resistance | 3 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Not in a position to accept new order because of discontinuation.
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAH55 | Ohara | 1.834807 | 42.72372 | |
| H-ZLAF55D | CDGM | 1.83481 | 42.725177 | |
| S-LAH55V | Ohara | 1.834807 | 42.725324 | |
| S-LAH55 | Ohara | 1.834807 | 42.713673 | |
| H-ZLAF55C | CDGM | 1.83481 | 42.711575 | |
| K-LaSFn8W | Sumita | 1.8349 | 42.7 | |
| S-LAH55VS | Ohara | 1.834809 | 42.74368 | |
| K-LaSFn8 | Sumita | 1.835 | 42.7 | |
| LASFN8 | Sumita | 1.835 | 42.7 | |
| N-LASF41 | Schott | 1.83501 | 43.13 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| TAFD5G | Hoya | 1.83481 | 42.72 | |
| TAFD5 | Hoya | 1.835 | 42.984244 | |
| TAFD6 | Hoya | 1.847498 | 43.033415 | |
| MC-TAFD51-50 | Hoya | 1.8213 | 42.72 | |
| MP-TAFD51-50 | Hoya | 1.8213 | 42.72 | |
| M-TAFD51 | Hoya | 1.8208 | 42.71 | |
| TAFD34 | Hoya | 1.85033 | 42.7 | |
| TAFD10 | Hoya | 1.815502 | 44.5379 | |
| M-TAFD305 | Hoya | 1.85135 | 40.1 | |
| MP-TAFD305 | Hoya | 1.85135 | 40.1 |