TAFD65 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) | 2.0509 |
|---|---|
| Abbe Number (Vd) | 26.94 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{4.01132 - 0.017752\,\lambda^2 + 0.0585693\,\lambda^{-2} + 0.00432009\,\lambda^{-4} - 0.000310708\,\lambda^{-6} + 3.74856 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.9 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-6.69 \times 10^{-7} + 2(9.68 \times 10^{-9})\,\Delta T + 3(-3.75 \times 10^{-11})\,\Delta T^2 + \frac{1.14 \times 10^{-6} + 2(1.22 \times 10^{-9})\,\Delta T}{\lambda - 0.264}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 5.27 |
|---|---|
| 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
Recommended glass type
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-ZLAF96 | CDGM | 2.0509 | 26.985858 | |
| LASF35 | Schott | 2.02204 | 29.06 | |
| K-BOC30 | Sumita | 2.0068 | 26.2 | |
| K-BOC20 | Sumita | 2.0054 | 27.7 | |
| S-LAH79 | Ohara | 2.0033 | 28.27328 | |
| H-ZLAF92A | CDGM | 2.0033 | 28.275906 | |
| CAMOO4-E | Generic Birefringent | 2.002336 | 26.628162 | |
| H-ZLAF92 | CDGM | 2.0033 | 28.316305 | |
| K-PSFn202P | Sumita | 2.0216 | 21.4 | |
| K-PSFn202 | Sumita | 2.0196 | 21.5 |