K-LaSFn16 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) | 1.7883 |
|---|---|
| Abbe Number (Vd) | 47.4 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.12453 - 0.014985\,\lambda^2 + 0.0247959\,\lambda^{-2} + 0.000962716\,\lambda^{-4} - 6.4587 \times 10^{-5}\,\lambda^{-6} + 4.61624 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.4 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.2 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.27 \times 10^{-6} + 2(1.53 \times 10^{-8})\,\Delta T + 3(-2.61 \times 10^{-10})\,\Delta T^2 + \frac{5.42 \times 10^{-7} + 2(5.61 \times 10^{-10})\,\Delta T}{\lambda - 0.206}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.76 |
|---|---|
| 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 | |
|---|---|---|---|---|
| D88-47 | Corning | 1.788001 | 47.412327 | |
| LAH64 | Ohara | 1.788001 | 47.385275 | |
| S-LAH64 | Ohara | 1.788001 | 47.368522 | |
| LAFN21 | Schott | 1.788309 | 47.470398 | |
| TAF4 | Hoya | 1.788 | 47.49 | |
| N-LAF21 | Schott | 1.788 | 47.49 | |
| H-LAF10LA | CDGM | 1.788 | 47.491731 | |
| TAF48 | Hoya | 1.79091 | 48.09 | |
| M-TAF401 | Hoya | 1.77377 | 47.17 | |
| MC-TAF401 | Hoya | 1.77377 | 47.17 |