LAFL20 by Hoya
Obsolete
Unknown
Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
No transmission data available.
Optical Properties
| Refractive Index (nd) | 1.68248 |
|---|---|
| Abbe Number (Vd) | 48.197606 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{2.76781 - 0.0086749\,\lambda^2 + 0.0221235\,\lambda^{-2} + 9.14886 \times 10^{-5}\,\lambda^{-4} + 4.82287 \times 10^{-5}\,\lambda^{-6} - 1.37435 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | — |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | — |
|---|---|
| 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 | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAF20 | Schott | 1.682476 | 48.200977 | |
| LAFN1 | Sumita | 1.685 | 49.2 | |
| C90-50 | Corning | 1.689009 | 49.625392 | |
| LAFN23 | Schott | 1.689004 | 49.711581 | |
| H-ZBAF5 | CDGM | 1.67103 | 47.288963 | |
| H-LAF1 | CDGM | 1.69362 | 49.193837 | |
| BAH10 | Ohara | 1.670029 | 47.253429 | |
| S-BAH10 | Ohara | 1.670029 | 47.230916 | |
| BAF10 | Sumita | 1.67003 | 47.2 | |
| H-ZBAF52 | CDGM | 1.67003 | 47.19506 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAFL1 | Hoya | 1.686004 | 49.347081 | |
| LAFL23 | Hoya | 1.689 | 49.475821 | |
| BAF10 | Hoya | 1.67003 | 47.2 | |
| LAFL2 | Hoya | 1.697 | 48.514006 | |
| BAF11 | Hoya | 1.66672 | 48.3 | |
| LACL9 | Hoya | 1.6779 | 50.551353 | |
| LAFL3 | Hoya | 1.700301 | 47.836538 | |
| BAF21 | Hoya | 1.66422 | 48.941939 | |
| LACL5 | Hoya | 1.693503 | 50.787122 | |
| BAF22 | Hoya | 1.682496 | 44.671672 |