LLF1HT 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) | 1.548144 |
|---|---|
| Abbe Number (Vd) | 45.888593 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.23327\,\lambda^2}{\lambda^2 - 0.00885397} + \frac{0.116924\,\lambda^2}{\lambda^2 - 0.0436875} + \frac{0.862645\,\lambda^2}{\lambda^2 - 104.992}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.1 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.2 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.94 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | 0 |
| Acid Resistance | 1 |
| Alkali Resistance | 2 |
| Phosphate Resistance | 1 |
Notes
old, High UV Transmission; glass data moved from former "I_LINE" catalog
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| QF1 | CDGM | 1.5481 | 45.886233 | |
| LLF1 | Sumita | 1.54814 | 45.9 | |
| FEL1 | Hoya | 1.548136 | 45.822169 | |
| H-QF1 | CDGM | 1.54814 | 45.820011 | |
| E-FEL1 | Hoya | 1.54814 | 45.82 | |
| S-TIL1 | Ohara | 1.548141 | 45.784277 | |
| PBL1 | Ohara | 1.548141 | 45.781144 | |
| PBL1Y | Ohara | 1.548141 | 45.733282 | |
| B48-46 | Corning | 1.548098 | 45.718533 | |
| PBL7 | Ohara | 1.548689 | 45.555746 |
Similar Glasses (Schott)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LLF1HTi | Schott | 1.54815 | 45.9 | |
| N-LLF1 | Schott | 1.54814 | 45.851572 | |
| LLF1 | Schott | 1.54814 | 45.75 | |
| LLF7 | Schott | 1.548831 | 45.40834 | |
| LLF2 | Schott | 1.540719 | 47.171344 | |
| LF8 | Schott | 1.564435 | 43.75028 | |
| LLF6 | Schott | 1.531719 | 48.762595 | |
| TIF3 | Schott | 1.547649 | 42.203707 | |
| N-LLF6 | Schott | 1.531688 | 48.895238 | |
| KZFN1 | Schott | 1.551149 | 49.637723 |