K-LaKn11 by Sumita
Obsolete
Very 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) | 1.6583 |
|---|---|
| Abbe Number (Vd) | 53.4 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{2.69946 - 0.0114412\,\lambda^2 + 0.0176729\,\lambda^{-2} + 0.000396046\,\lambda^{-4} - 3.57392 \times 10^{-6}\,\lambda^{-6} + 7.08616 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | 8.2 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.99 \times 10^{-7} + 2(1.21 \times 10^{-8})\,\Delta T + 3(-1.58 \times 10^{-10})\,\Delta T^2 + \frac{5.15 \times 10^{-7} + 2(8.57 \times 10^{-10})\,\Delta T}{\lambda - 0.196}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.75 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LACL3 | Hoya | 1.664798 | 53.401295 | |
| BSM71 | Ohara | 1.648497 | 53.035185 | |
| BACED20 | Hoya | 1.648498 | 53.03151 | |
| E-BACED20 | Hoya | 1.6485 | 53.03 | |
| S-BSM71 | Ohara | 1.648498 | 53.023881 | |
| H-LAK11 | CDGM | 1.66461 | 54.612239 | |
| BBO | Generic Birefringent | 1.670737 | 52.593907 | |
| H-ZBAF3 | CDGM | 1.65691 | 51.12138 | |
| H-LAK67 | CDGM | 1.67 | 51.738482 | |
| D-LAK70-25 | CDGM | 1.668 | 55.295752 |