K-LaSFn6 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) | 1.804 |
|---|---|
| Abbe Number (Vd) | 46.6 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.1766 - 0.0152146\,\lambda^2 + 0.0266744\,\lambda^{-2} + 0.000746745\,\lambda^{-4} - 2.63508 \times 10^{-5}\,\lambda^{-6} + 2.7515 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.9 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.4 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.72 \times 10^{-6} + 2(1.48 \times 10^{-8})\,\Delta T + 3(-1.94 \times 10^{-10})\,\Delta T^2 + \frac{5.94 \times 10^{-7} + 2(9.48 \times 10^{-10})\,\Delta T}{\lambda - 0.205}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.72 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 3 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| S-LAH65V | Ohara | 1.803999 | 46.583432 | |
| LAH65 | Ohara | 1.804 | 46.575911 | |
| H-ZLAF50D | CDGM | 1.804 | 46.575016 | |
| H-ZLAF50E | CDGM | 1.804 | 46.574487 | |
| S-LAH65 | Ohara | 1.804 | 46.570373 | |
| S-LAH65VS | Ohara | 1.804 | 46.527532 | |
| N-LASF44 | Schott | 1.8042 | 46.5 | |
| TAF3 | Hoya | 1.8042 | 46.5 | |
| TAF3D | Hoya | 1.8042 | 46.5 | |
| H-ZLAF2A | CDGM | 1.80279 | 46.761307 |