K-LaSFn10 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) | 1.8155 |
|---|---|
| Abbe Number (Vd) | 44.4 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.21281 - 0.0155875\,\lambda^2 + 0.0282493\,\lambda^{-2} + 0.000864396\,\lambda^{-4} - 2.91755 \times 10^{-5}\,\lambda^{-6} + 2.99125 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.6 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.2 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.02 \times 10^{-6} + 2(1.34 \times 10^{-8})\,\Delta T + 3(-1.66 \times 10^{-10})\,\Delta T^2 + \frac{6.41 \times 10^{-7} + 2(6.88 \times 10^{-10})\,\Delta T}{\lambda - 0.194}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.8 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 2 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAH54 | Ohara | 1.815543 | 44.361146 | |
| S-LAH54 | Ohara | 1.815543 | 44.361146 | |
| TAFD10 | Hoya | 1.815502 | 44.5379 | |
| M-TAFD51 | Hoya | 1.8208 | 42.71 | |
| MP-TAFD51-50 | Hoya | 1.8213 | 42.72 | |
| MC-TAFD51-50 | Hoya | 1.8213 | 42.72 | |
| NBFD14 | Hoya | 1.801699 | 44.321602 | |
| H-ZLAF1 | CDGM | 1.80166 | 44.263459 | |
| D-ZLAF61-25 | CDGM | 1.82131 | 42.674895 | |
| D-ZLAF61 | CDGM | 1.82241 | 42.714541 |