K-LaSFn1 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) | 1.8061 |
|---|---|
| Abbe Number (Vd) | 40.7 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36 — 1.55 µm |
$$n(\lambda) = \sqrt{3.17045 - 0.0128721\,\lambda^2 + 0.0307113\,\lambda^{-2} + 0.000914676\,\lambda^{-4} - 4.21792 \times 10^{-5}\,\lambda^{-6} + 5.8855 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.7 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[6.7 \times 10^{-7} + 2(1.3 \times 10^{-8})\,\Delta T + 3(-3.16 \times 10^{-10})\,\Delta T^2 + \frac{7.17 \times 10^{-7} + 2(7.77 \times 10^{-10})\,\Delta T}{\lambda - 0.224}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.17 |
|---|---|
| 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 | |
|---|---|---|---|---|
| MC-NBFD130L | Hoya | 1.8061 | 40.73 | |
| NBFD13 | Hoya | 1.8061 | 40.73 | |
| MC-NBFD130 | Hoya | 1.8061 | 40.73 | |
| M-NBFD130 | Hoya | 1.8061 | 40.73 | |
| MP-NBFD130 | Hoya | 1.8061 | 40.73 | |
| M-NBFD13 | Hoya | 1.8061 | 40.740652 | |
| N-LASF43 | Schott | 1.8061 | 40.61 | |
| P-LASF47 | Schott | 1.8061 | 40.9 | |
| L-LAH53 | Ohara | 1.806249 | 40.907302 | |
| S-LAH53 | Ohara | 1.806098 | 40.925996 |