K-LaSFn17 by Sumita
Standard
Medium
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) | 1.883 |
|---|---|
| Abbe Number (Vd) | 40.8 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.4 — 1.55 µm |
$$n(\lambda) = \sqrt{3.44341 - 0.0154747\,\lambda^2 + 0.033696\,\lambda^{-2} + 0.00128786\,\lambda^{-4} - 4.54742 \times 10^{-5}\,\lambda^{-6} + 3.86796 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.9 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.16 \times 10^{-6} + 2(1.35 \times 10^{-8})\,\Delta T + 3(-2.1 \times 10^{-10})\,\Delta T^2 + \frac{7.19 \times 10^{-7} + 2(4.1 \times 10^{-10})\,\Delta T}{\lambda - 0.207}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 5.54 |
|---|---|
| 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 | |
|---|---|---|---|---|
| H-ZLAF68B | CDGM | 1.883004 | 40.806875 | |
| TAFD30 | Hoya | 1.883 | 40.81 | |
| LAH58 | Ohara | 1.882997 | 40.778667 | |
| S-LAH58 | Ohara | 1.882997 | 40.765107 | |
| N-LASF31A | Schott | 1.883 | 40.76 | |
| H-ZLAF68C | CDGM | 1.883 | 40.847465 | |
| LASFN31 | Schott | 1.880669 | 41.009774 | |
| N-LASF31 | Schott | 1.88067 | 41.01 | |
| H-ZLAF73 | CDGM | 1.881 | 40.161331 | |
| TAFD33 | Hoya | 1.881 | 40.14 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LASFN17 | Sumita | 1.883 | 40.9 | |
| LASFN13 | Sumita | 1.863 | 41.6 | |
| K-VC185 | Sumita | 1.85375 | 40.6 | |
| K-VC99 | Sumita | 1.8506 | 41.6 | |
| K-VC90 | Sumita | 1.8528 | 39.0 | |
| K-VC185(M) | Sumita | 1.84909 | 40.5 | |
| K-VC90(M) | Sumita | 1.84859 | 38.9 | |
| K-VC99(M) | Sumita | 1.84604 | 41.5 | |
| K-VC91 | Sumita | 1.8866 | 35.0 | |
| K-VC91(M) | Sumita | 1.88175 | 34.9 |