LAM59 by Ohara
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) | 1.697002 |
|---|---|
| Abbe Number (Vd) | 48.535864 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.3 — 2.4 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.62695\,\lambda^2}{\lambda^2 - 0.0087575} + \frac{0.190668\,\lambda^2}{\lambda^2 - 0.0377972} + \frac{1.28108\,\lambda^2}{\lambda^2 - 123.778}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.5 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-5.171 \times 10^{-7} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.06 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 53 |
| Alkali Resistance | — |
| Phosphate Resistance | 3 |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAFL2 | Hoya | 1.697 | 48.514006 | |
| LAFN2 | Sumita | 1.697 | 48.5 | |
| H-LAF51 | CDGM | 1.7 | 48.079839 | |
| LAFN3 | Sumita | 1.7 | 48.0 | |
| K-LaFn3 | Sumita | 1.7 | 48.0 | |
| H-LAF1 | CDGM | 1.69362 | 49.193837 | |
| LAFL3 | Hoya | 1.700301 | 47.836538 | |
| LAFL23 | Hoya | 1.689 | 49.475821 | |
| C90-50 | Corning | 1.689009 | 49.625392 | |
| LAFN23 | Schott | 1.689004 | 49.711581 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| S-LAM59 | Ohara | 1.697002 | 48.516066 | |
| S-LAM51 | Ohara | 1.699998 | 48.080479 | |
| LAM51 | Ohara | 1.699998 | 48.078869 | |
| LAL58 | Ohara | 1.693495 | 50.807634 | |
| S-LAL58 | Ohara | 1.693495 | 50.810652 | |
| S-LAL20 | Ohara | 1.6993 | 51.112184 | |
| LAM3 | Ohara | 1.717004 | 47.942632 | |
| S-LAM3 | Ohara | 1.717004 | 47.927969 | |
| S-LAL56 | Ohara | 1.677898 | 50.722184 | |
| LAL56 | Ohara | 1.677898 | 50.723364 |