LLF2 by Schott
Obsolete
Unknown
Environmentally Dangerous
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) | 1.540719 |
|---|---|
| Abbe Number (Vd) | 47.171344 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.21699\,\lambda^2}{\lambda^2 - 0.00867188} + \frac{0.112444\,\lambda^2}{\lambda^2 - 0.0426922} + \frac{0.839332\,\lambda^2}{\lambda^2 - 102.333}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.9 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.1 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.79 \times 10^{-7} + 2(1.57 \times 10^{-8})\,\Delta T + 3(-6.67 \times 10^{-11})\,\Delta T^2 + \frac{6.35 \times 10^{-7} + 2(1.12 \times 10^{-9})\,\Delta T}{\lambda - 0.241}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.87 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
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Similar Glasses (Other Manufacturers)
Similar Glasses (Schott)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LLF1HTi | Schott | 1.54815 | 45.9 | |
| LLF1HT | Schott | 1.548144 | 45.888593 | |
| N-LLF1 | Schott | 1.54814 | 45.851572 | |
| LLF1 | Schott | 1.54814 | 45.75 | |
| LLF6 | Schott | 1.531719 | 48.762595 | |
| LLF7 | Schott | 1.548831 | 45.40834 | |
| N-LLF6 | Schott | 1.531688 | 48.895238 | |
| LLF6HT | Schott | 1.531739 | 48.974492 | |
| KZFN1 | Schott | 1.551149 | 49.637723 | |
| LF8 | Schott | 1.564435 | 43.75028 |