H-LAK7A 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) | 1.713 |
|---|---|
| Abbe Number (Vd) | 53.832974 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.302 — 2.325 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.20675\,\lambda^2}{\lambda^2 - 84.3499} + \frac{1.06718\,\lambda^2}{\lambda^2 - 0.0043819} + \frac{0.81123\,\lambda^2}{\lambda^2 - 0.0189829}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 5.5 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.3 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.82 \times 10^{-6} + 2(1.41 \times 10^{-8})\,\Delta T + 3(-1.49 \times 10^{-11})\,\Delta T^2 + \frac{4.32 \times 10^{-7} + 2(7.94 \times 10^{-10})\,\Delta T}{\lambda - 0.207}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.74 |
|---|---|
| Relative Cost | 2.8 |
Mechanical Properties
| Young's Modulus (GPa) | 115.15 |
|---|---|
| Poisson's Ratio | 0.271 |
| Knoop Hardness (kgf/mm²) | 703.0 |
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-LAK71 | CDGM | 1.703 | 52.406734 | |
| H-LAK72 | CDGM | 1.713 | 51.80665 | |
| D-LAK52-25 | CDGM | 1.72924 | 53.851219 | |
| H-LAK52 | CDGM | 1.72916 | 54.684737 | |
| D-LAK52 | CDGM | 1.7305 | 53.944268 | |
| H-LAK6A | CDGM | 1.6935 | 53.380441 | |
| D-LAK6 | CDGM | 1.69384 | 53.128245 | |
| H-LAK51A | CDGM | 1.6968 | 55.526357 | |
| D-LAK6-25 | CDGM | 1.69281 | 53.049215 | |
| H-LAK2A | CDGM | 1.69211 | 54.539198 |