K-LaKn2 by Sumita
Standard
Rare
Environmentally Friendly
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) | 1.6405 |
|---|---|
| Abbe Number (Vd) | 60.1 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{2.64985 - 0.0130789\,\lambda^2 + 0.0148871\,\lambda^{-2} + 0.000362187\,\lambda^{-4} - 1.15063 \times 10^{-5}\,\lambda^{-6} + 6.13009 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.9 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.24 \times 10^{-6} + 2(1.48 \times 10^{-8})\,\Delta T + 3(-2.56 \times 10^{-10})\,\Delta T^2 + \frac{3.66 \times 10^{-7} + 2(4.69 \times 10^{-10})\,\Delta T}{\lambda - 0.182}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.66 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 5 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| N-LAK21 | Schott | 1.64049 | 60.1 | |
| LAK21 | Schott | 1.640495 | 60.101885 | |
| C41-60 | Corning | 1.640495 | 60.130957 | |
| BSM81 | Ohara | 1.639999 | 60.091709 | |
| S-BSM81 | Ohara | 1.639999 | 60.078127 | |
| LACL6 | Hoya | 1.640003 | 60.153568 | |
| LACL60 | Hoya | 1.64 | 60.2 | |
| H-LAK4L | CDGM | 1.64 | 60.202769 | |
| LAKL21 | Schott | 1.64048 | 59.749915 | |
| S-BSM36 | Ohara | 1.642495 | 58.369399 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAKN2 | Sumita | 1.6405 | 60.1 | |
| K-LaK6 | Sumita | 1.6425 | 58.1 | |
| LAK6 | Sumita | 1.6425 | 58.1 | |
| LAK7 | Sumita | 1.6516 | 58.3 | |
| K-LaK7 | Sumita | 1.6516 | 58.3 | |
| K-LaFK65(M) | Sumita | 1.65224 | 62.2 | |
| SK16RH | Sumita | 1.62041 | 60.3 | |
| SK16 | Sumita | 1.62041 | 60.3 | |
| K-SK16RH | Sumita | 1.62041 | 60.3 | |
| K-LaFK63(M) | Sumita | 1.63463 | 63.0 |