N-LAF32 by Schott
Obsolete
Unknown
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) | 1.79457 |
|---|---|
| Abbe Number (Vd) | 45.53 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.35 — 2.5 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.91731\,\lambda^2}{\lambda^2 - 0.009786} + \frac{0.22402\,\lambda^2}{\lambda^2 - 0.0386141} + \frac{1.22087\,\lambda^2}{\lambda^2 - 84.6431}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.89 |
|---|---|
| TCE 100/300°C (10-6/K) | 6.98 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.8 \times 10^{-6} + 2(1.1 \times 10^{-8})\,\Delta T + 3(-1.83 \times 10^{-11})\,\Delta T^2 + \frac{6.37 \times 10^{-7} + 2(8.03 \times 10^{-10})\,\Delta T}{\lambda - 0.196}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.325 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 1 |
| Acid Resistance | 51 |
| Alkali Resistance | 1 |
| Phosphate Resistance | 2 |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| TAF2 | Hoya | 1.7945 | 45.39 | |
| S-LAH67 | Ohara | 1.794997 | 45.293967 | |
| LAH67 | Ohara | 1.794997 | 45.293967 | |
| LASFN19 | Sumita | 1.795 | 45.2 | |
| E00-46 | Corning | 1.800001 | 45.608618 | |
| M-TAF31 | Hoya | 1.80139 | 45.45 | |
| MP-TAF31-15 | Hoya | 1.80154 | 45.47 | |
| MC-TAF31-15 | Hoya | 1.80154 | 45.47 | |
| D-ZLAF50-25 | CDGM | 1.80225 | 45.452746 | |
| D-ZLAF50 | CDGM | 1.80337 | 45.491557 |
Similar Glasses (Schott)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LASFN30 | Schott | 1.803181 | 46.379894 | |
| N-LASF44 | Schott | 1.8042 | 46.5 | |
| N-LAF33 | Schott | 1.78582 | 44.05 | |
| LAFN10 | Schott | 1.784432 | 43.950523 | |
| LAFN21 | Schott | 1.788309 | 47.470398 | |
| N-LAF21 | Schott | 1.788 | 47.49 | |
| N-LAF36 | Schott | 1.79952 | 42.37 | |
| P-LASF47 | Schott | 1.8061 | 40.9 | |
| LAFN28 | Schott | 1.773142 | 49.568242 | |
| P-LASF51 | Schott | 1.81 | 40.93 |