K-LaSFn3 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) | 1.7995 |
|---|---|
| Abbe Number (Vd) | 42.3 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.15072 - 0.012461\,\lambda^2 + 0.0299107\,\lambda^{-2} + 0.000507331\,\lambda^{-4} + 3.62789 \times 10^{-5}\,\lambda^{-6} - 2.50198 \times 10^{-8}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.9 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.38 \times 10^{-7} + 2(3.13 \times 10^{-8})\,\Delta T + 3(-2.27 \times 10^{-11})\,\Delta T^2 + \frac{6.92 \times 10^{-7} + 2(5.55 \times 10^{-10})\,\Delta T}{\lambda - 0.218}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.39 |
|---|---|
| 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 | |
|---|---|---|---|---|
| NBFD12 | Hoya | 1.7995 | 42.34 | |
| H-LAF54 | CDGM | 1.799519 | 42.253294 | |
| LAH52 | Ohara | 1.799516 | 42.241337 | |
| S-LAH52Q | Ohara | 1.79952 | 42.239506 | |
| N-LAF36 | Schott | 1.79952 | 42.37 | |
| S-LAH52 | Ohara | 1.799516 | 42.225007 | |
| D96-43 | Corning | 1.796195 | 43.217783 | |
| NBFD2 | Hoya | 1.797199 | 41.143795 | |
| NBFD1 | Hoya | 1.789004 | 42.757634 | |
| H-ZLAF52A | CDGM | 1.8061 | 41.016887 |
Similar Glasses (Sumita)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LASFN3 | Sumita | 1.7995 | 42.3 | |
| K-VC179 | Sumita | 1.7989 | 41.8 | |
| K-VC179(M) | Sumita | 1.79441 | 41.9 | |
| K-VC100(M) | Sumita | 1.79916 | 43.5 | |
| K-VC100 | Sumita | 1.804 | 43.6 | |
| K-VC181(M) | Sumita | 1.80614 | 41.1 | |
| K-VC89(M) | Sumita | 1.8059 | 40.9 | |
| LASFN1 | Sumita | 1.806 | 40.7 | |
| K-LaSFn1 | Sumita | 1.8061 | 40.7 | |
| K-VC181 | Sumita | 1.81055 | 41.1 |