K-LaSFn9 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) | 1.816 |
|---|---|
| Abbe Number (Vd) | 46.7 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.21844 - 0.0149064\,\lambda^2 + 0.0269262\,\lambda^{-2} + 0.000874097\,\lambda^{-4} - 4.03313 \times 10^{-5}\,\lambda^{-6} + 3.16777 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.6 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.34 \times 10^{-6} + 2(2.13 \times 10^{-8})\,\Delta T + 3(-1.52 \times 10^{-10})\,\Delta T^2 + \frac{5.8 \times 10^{-7} + 2(6.95 \times 10^{-10})\,\Delta T}{\lambda - 0.204}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.96 |
|---|---|
| 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 | — |