H-LAK8A by CDGM
Standard
Rare
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) | 1.72 |
|---|---|
| Abbe Number (Vd) | 50.343857 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.302 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.13862\,\lambda^2}{\lambda^2 - 80.0745} + \frac{0.158051\,\lambda^2}{\lambda^2 - 0.0368198} + \frac{1.73935\,\lambda^2}{\lambda^2 - 0.00909532}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.2 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.02 \times 10^{-6} + 2(1.82 \times 10^{-8})\,\Delta T + 3(-1.04 \times 10^{-10})\,\Delta T^2 + \frac{4.87 \times 10^{-7} + 2(9.07 \times 10^{-10})\,\Delta T}{\lambda - 0.216}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.77 |
|---|---|
| Relative Cost | 6.3 |
Mechanical Properties
| Young's Modulus (GPa) | 109.41 |
|---|---|
| Poisson's Ratio | 0.292 |
| Knoop Hardness (kgf/mm²) | 607.0 |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-LAK8B | CDGM | 1.72 | 50.280736 | |
| H-LAK72 | CDGM | 1.713 | 51.80665 | |
| H-LAK54 | CDGM | 1.734 | 51.485829 | |
| H-LAF2 | CDGM | 1.717 | 47.888609 | |
| H-LAK71 | CDGM | 1.703 | 52.406734 | |
| D-LAF53-25 | CDGM | 1.7421 | 49.246024 | |
| D-LAF53 | CDGM | 1.7433 | 49.325949 | |
| H-LAF53 | CDGM | 1.7433 | 49.221808 | |
| H-LAF51 | CDGM | 1.7 | 48.079839 | |
| H-LAK7A | CDGM | 1.713 | 53.832974 |