LAFL4 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) | 1.712704 |
|---|---|
| Abbe Number (Vd) | 43.295113 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.334 — 2.325 µm |
$$n(\lambda) = \sqrt{2.85547 - 0.00960968\,\lambda^2 + 0.0294213\,\lambda^{-2} - 0.00107604\,\lambda^{-4} + 0.000236124\,\lambda^{-6} - 1.03721 \times 10^{-5}\,\lambda^{-8}}$$
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 | |
|---|---|---|---|---|
| H-LAF62 | CDGM | 1.72 | 43.680739 | |
| S-LAM52 | Ohara | 1.72 | 43.689812 | |
| LAFN4 | Sumita | 1.72 | 43.7 | |
| LAM52 | Ohara | 1.72 | 43.705625 | |
| LAFN10 | Sumita | 1.72016 | 42.1 | |
| LAM58 | Ohara | 1.72 | 41.989859 | |
| S-LAM58 | Ohara | 1.72 | 41.978463 | |
| BAH27 | Ohara | 1.701536 | 41.242277 | |
| S-BAH27 | Ohara | 1.701536 | 41.23944 | |
| BAH77 | Ohara | 1.701539 | 41.21001 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAFL5 | Hoya | 1.719998 | 43.903303 | |
| LAFL6 | Hoya | 1.72 | 42.016239 | |
| BAFD7 | Hoya | 1.70154 | 41.15 | |
| BAFD15 | Hoya | 1.701999 | 40.195943 | |
| ADF8 | Hoya | 1.686498 | 42.863902 | |
| BAF20 | Hoya | 1.685777 | 43.901833 | |
| M-LAF81 | Hoya | 1.73077 | 40.5 | |
| MP-LAF81 | Hoya | 1.73077 | 40.5 | |
| BAF22 | Hoya | 1.682496 | 44.671672 | |
| LAF20 | Hoya | 1.744 | 44.872914 |