LAFN10 by Sumita
Obsolete
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) | 1.72016 |
|---|---|
| Abbe Number (Vd) | 42.1 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.88438 - 0.0108484\,\lambda^2 + 0.0250872\,\lambda^{-2} + 0.000635686\,\lambda^{-4} + 4.96363 \times 10^{-6}\,\lambda^{-6} + 2.51403 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 8.5 |
| 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) | 4.08 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAFL6 | Hoya | 1.72 | 42.016239 | |
| LAM58 | Ohara | 1.72 | 41.989859 | |
| S-LAM58 | Ohara | 1.72 | 41.978463 | |
| LAFL4 | Hoya | 1.712704 | 43.295113 | |
| H-LAF62 | CDGM | 1.72 | 43.680739 | |
| S-LAM52 | Ohara | 1.72 | 43.689812 | |
| LAM52 | Ohara | 1.72 | 43.705625 | |
| LAFL5 | Hoya | 1.719998 | 43.903303 | |
| D-LAF79-25 | CDGM | 1.72986 | 40.497566 | |
| LAFN8 | Schott | 1.735197 | 41.590899 |