LAKN10 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) | 1.692 |
|---|---|
| Abbe Number (Vd) | 50.6 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.80335 - 0.0102837\,\lambda^2 + 0.0208117\,\lambda^{-2} + 0.000276256\,\lambda^{-4} + 1.97752 \times 10^{-5}\,\lambda^{-6} - 2.81272 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 9.1 |
| 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) | 4.07 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LACL5 | Hoya | 1.693503 | 50.787122 | |
| LAL58 | Ohara | 1.693495 | 50.807634 | |
| S-LAL58 | Ohara | 1.693495 | 50.810652 | |
| LAFN23 | Schott | 1.689004 | 49.711581 | |
| C90-50 | Corning | 1.689009 | 49.625392 | |
| S-LAL20 | Ohara | 1.6993 | 51.112184 | |
| LAFL23 | Hoya | 1.689 | 49.475821 | |
| H-LAF1 | CDGM | 1.69362 | 49.193837 | |
| LAFL1 | Hoya | 1.686004 | 49.347081 | |
| LACL9 | Hoya | 1.6779 | 50.551353 |