TAFD40 by Hoya
Standard
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) | 2.00069 |
|---|---|
| Abbe Number (Vd) | 25.46 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{3.81062 - 0.0163516\,\lambda^2 + 0.0588011\,\lambda^{-2} + 0.0034919\,\lambda^{-4} - 0.000169481\,\lambda^{-6} + 3.25693 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.2 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.7 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.53 \times 10^{-6} + 2(7.62 \times 10^{-9})\,\Delta T + 3(-3.12 \times 10^{-11})\,\Delta T^2 + \frac{1.08 \times 10^{-6} + 2(1.19 \times 10^{-9})\,\Delta T}{\lambda - 0.287}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.73 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 1 |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
General glass type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-ZLAF90A | CDGM | 2.00069 | 25.458056 | |
| H-ZLAF90 | CDGM | 2.00069 | 25.425752 | |
| K-BOC30 | Sumita | 2.0068 | 26.2 | |
| CAMOO4-E | Generic Birefringent | 2.002336 | 26.628162 | |
| K-BOC20 | Sumita | 2.0054 | 27.7 | |
| S-LAH79 | Ohara | 2.0033 | 28.27328 | |
| H-ZLAF92A | CDGM | 2.0033 | 28.275906 | |
| H-ZLAF92 | CDGM | 2.0033 | 28.316305 | |
| CAMOO4 | Generic Birefringent | 1.992539 | 28.832428 | |
| S-LAH99 | Ohara | 2.001 | 29.139473 |