H-LAF3B by CDGM
Preferred
Very Common
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) | 1.744 |
|---|---|
| Abbe Number (Vd) | 44.900027 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.365 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.66487\,\lambda^2}{\lambda^2 - 0.00895647} + \frac{0.301622\,\lambda^2}{\lambda^2 - 0.03503} + \frac{1.19739\,\lambda^2}{\lambda^2 - 123.334}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.7 |
| Thermal Conductivity (W/mK) | 0.571 |
| Heat Capacity (J/gK) | 0.423 |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-3.14 \times 10^{-6} + 2(1.29 \times 10^{-8})\,\Delta T + 3(-3.08 \times 10^{-11})\,\Delta T^2 + \frac{6.91 \times 10^{-7} + 2(5.97 \times 10^{-10})\,\Delta T}{\lambda - 0.223}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.39 |
|---|---|
| Relative Cost | 3.3 |
Mechanical Properties
| Young's Modulus (GPa) | 97.81 |
|---|---|
| Poisson's Ratio | 0.294 |
| Knoop Hardness (kgf/mm²) | 568.0 |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| K-LaF2 | Sumita | 1.744 | 44.9 | |
| LAF2 | Sumita | 1.744 | 44.9 | |
| LAF2 | Hoya | 1.744 | 44.9 | |
| LAF20 | Hoya | 1.744 | 44.872914 | |
| N-LAF2 | Schott | 1.74397 | 44.85 | |
| D44-45 | Corning | 1.744001 | 44.818533 | |
| LAM2 | Ohara | 1.743997 | 44.787528 | |
| S-LAM2 | Ohara | 1.743997 | 44.786431 | |
| LAF2 | Schott | 1.744002 | 44.719972 | |
| K-VC174(M) | Sumita | 1.74578 | 45.1 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-LAF6LA | CDGM | 1.757 | 47.711817 | |
| H-LAF62 | CDGM | 1.72 | 43.680739 | |
| H-LAF53 | CDGM | 1.7433 | 49.221808 | |
| D-LAF53-25 | CDGM | 1.7421 | 49.246024 | |
| D-LAF53 | CDGM | 1.7433 | 49.325949 | |
| H-LAF2 | CDGM | 1.717 | 47.888609 | |
| D-LAF79 | CDGM | 1.73077 | 40.508021 | |
| D-LAF79-25 | CDGM | 1.72986 | 40.497566 | |
| D-LAF050-25 | CDGM | 1.76709 | 49.197491 | |
| H-LAF55 | CDGM | 1.762 | 40.105472 |