K-LaSFn23 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) | 1.911 |
|---|---|
| Abbe Number (Vd) | 35.2 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.52744 - 0.0146407\,\lambda^2 + 0.0403938\,\lambda^{-2} + 0.00154951\,\lambda^{-4} - 4.56672 \times 10^{-5}\,\lambda^{-6} + 9.09713 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.9 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.8 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.83 \times 10^{-8} + 2(1.49 \times 10^{-8})\,\Delta T + 3(-2.69 \times 10^{-10})\,\Delta T^2 + \frac{8.28 \times 10^{-7} + 2(7.87 \times 10^{-10})\,\Delta T}{\lambda - 0.248}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.9 |
|---|---|
| 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 | |
|---|---|---|---|---|
| TAFD35 | Hoya | 1.91082 | 35.25 | |
| TAFD35L | Hoya | 1.91082 | 35.25 | |
| H-ZLAF4LA | CDGM | 1.91082 | 35.25034 | |
| H-ZLAF4LB | CDGM | 1.91082 | 35.282389 | |
| S-LAH93 | Ohara | 1.90525 | 35.036826 | |
| CAWO4 | Generic Birefringent | 1.920414 | 34.953592 | |
| TAFD31 | Hoya | 1.922501 | 35.946005 | |
| H-ZLAF78B | CDGM | 1.90069 | 37.050531 | |
| TAFD37 | Hoya | 1.90043 | 37.37 | |
| TAFD37A | Hoya | 1.90043 | 37.37 |