LAFL2 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
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 1.697 |
|---|---|
| Abbe Number (Vd) | 48.514006 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.25 — 1.55 µm |
$$n(\lambda) = \sqrt{2.8178 - 0.0101263\,\lambda^2 + 0.0209898\,\lambda^{-2} + 0.000606923\,\lambda^{-4} - 2.1975 \times 10^{-5}\,\lambda^{-6} + 2.01729 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 86.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.05 |
|---|---|
| Relative Cost | 5.5 |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 3 |
| Acid Resistance | 3 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| S-LAM59 | Ohara | 1.697002 | 48.516066 | |
| LAFN2 | Sumita | 1.697 | 48.5 | |
| LAM59 | Ohara | 1.697002 | 48.535864 | |
| S-LAM51 | Ohara | 1.699998 | 48.080479 | |
| H-LAF51 | CDGM | 1.7 | 48.079839 | |
| LAM51 | Ohara | 1.699998 | 48.078869 | |
| K-LaFn3 | Sumita | 1.7 | 48.0 | |
| LAFN3 | Sumita | 1.7 | 48.0 | |
| H-LAF1 | CDGM | 1.69362 | 49.193837 | |
| C90-50 | Corning | 1.689009 | 49.625392 |