LAKN14 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) | 1.741 |
|---|---|
| Abbe Number (Vd) | 52.7 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.27 — 2.0 µm |
$$n(\lambda) = \sqrt{2.96922 - 0.013929\,\lambda^2 + 0.022225\,\lambda^{-2} + 0.000207542\,\lambda^{-4} + 2.49986 \times 10^{-5}\,\lambda^{-6} - 8.22468 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 7.1 |
| 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) | 4.32 |
|---|---|
| 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 | |
|---|---|---|---|---|
| H-LAK61 | CDGM | 1.740999 | 52.676196 | |
| LAL61 | Ohara | 1.740999 | 52.648747 | |
| S-LAL61 | Ohara | 1.740999 | 52.636502 | |
| TAC2 | Hoya | 1.741 | 52.61 | |
| S-LAL61Q | Ohara | 1.740999 | 52.60195 | |
| MGO | Generic IR | 1.737505 | 53.505455 | |
| LAK16A | Schott | 1.733501 | 51.779678 | |
| LAL59 | Ohara | 1.733997 | 51.488026 | |
| H-LAK54 | CDGM | 1.734 | 51.485829 | |
| S-LAL59 | Ohara | 1.733997 | 51.47057 |