H-LAK67 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) | 1.67 |
|---|---|
| Abbe Number (Vd) | 51.738482 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.302 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{0.388812\,\lambda^2}{\lambda^2 - 0.0250904} + \frac{1.10534\,\lambda^2}{\lambda^2 - 113.004} + \frac{1.34453\,\lambda^2}{\lambda^2 - 0.00715876}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 7.0 |
|---|---|
| TCE 100/300°C (10-6/K) | 8.4 |
| Thermal Conductivity (W/mK) | 0.708 |
| Heat Capacity (J/gK) | 0.511 |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.12 \times 10^{-6} + 2(1.36 \times 10^{-8})\,\Delta T + 3(-1.87 \times 10^{-11})\,\Delta T^2 + \frac{5.91 \times 10^{-7} + 2(3.35 \times 10^{-10})\,\Delta T}{\lambda - 0.215}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.73 |
|---|---|
| Relative Cost | 7.7 |
Mechanical Properties
| Young's Modulus (GPa) | 96.98 |
|---|---|
| Poisson's Ratio | 0.281 |
| Knoop Hardness (kgf/mm²) | 615.0 |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| LAKN7 | Sumita | 1.67 | 51.7 | |
| K-LaKn7 | Sumita | 1.67 | 51.7 | |
| LACL4 | Hoya | 1.669603 | 51.65903 | |
| BBO | Generic Birefringent | 1.670737 | 52.593907 | |
| LAL56 | Ohara | 1.677898 | 50.723364 | |
| S-LAL56 | Ohara | 1.677898 | 50.722184 | |
| LAKN8 | Sumita | 1.678 | 50.7 | |
| LACL9 | Hoya | 1.6779 | 50.551353 | |
| C58-51 | Corning | 1.658503 | 51.012014 | |
| SSKN5 | Schott | 1.65844 | 50.882921 |
Similar Glasses (CDGM)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-ZBAF50 | CDGM | 1.65844 | 50.852265 | |
| H-ZBAF3 | CDGM | 1.65691 | 51.12138 | |
| H-LAK11 | CDGM | 1.66461 | 54.612239 | |
| D-LAK5-25 | CDGM | 1.67686 | 54.805426 | |
| D-LAK5 | CDGM | 1.6779 | 54.889665 | |
| H-ZBAF16 | CDGM | 1.66672 | 48.421731 | |
| D-LAK6-25 | CDGM | 1.69281 | 53.049215 | |
| D-LAK6 | CDGM | 1.69384 | 53.128245 | |
| D-LAK70-25 | CDGM | 1.668 | 55.295752 | |
| H-LAK6A | CDGM | 1.6935 | 53.380441 |