L-LAM60 by Ohara
Standard
Very Rare
Precision Molding
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) | 1.743198 |
|---|---|
| Abbe Number (Vd) | 49.295578 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.365015 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.47574\,\lambda^2}{\lambda^2 - 0.0073695} + \frac{0.496133\,\lambda^2}{\lambda^2 - 0.0251892} + \frac{1.23796\,\lambda^2}{\lambda^2 - 98.0307}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.5 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.32 \times 10^{-6} + 2(7.99 \times 10^{-9})\,\Delta T + 3(-3.51 \times 10^{-11})\,\Delta T^2 + \frac{6.6 \times 10^{-7} + 2(8.15 \times 10^{-10})\,\Delta T}{\lambda - 0.191}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.2 |
|---|---|
| Relative Cost | 5.2 |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 3 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 51 |
| Alkali Resistance | — |
| Phosphate Resistance | 2 |
Notes
Low Softening Temperature
Similar Glasses (Other Manufacturers)
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAM60 | Ohara | 1.743198 | 49.309053 | |
| S-LAM60 | Ohara | 1.743198 | 49.339444 | |
| L-LAM72 | Ohara | 1.733099 | 48.896607 | |
| S-LAM54 | Ohara | 1.756998 | 47.82317 | |
| LAM54 | Ohara | 1.756998 | 47.815604 | |
| S-LAL59 | Ohara | 1.733997 | 51.47057 | |
| LAL59 | Ohara | 1.733997 | 51.488026 | |
| L-LAH91 | Ohara | 1.7645 | 49.096913 | |
| S-LAH96 | Ohara | 1.76385 | 48.488692 | |
| S-LAL10 | Ohara | 1.719995 | 50.230564 |