HWS7 by CDGM
Standard
Rare
Environmentally Dangerous
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) | — |
|---|---|
| Abbe Number (Vd) | — |
| Dispersion Formula | Herzberger |
| Wavelength Range | 2.0 — 14.0 µm |
$$L = \frac{1}{\lambda^2 - 0.028}
n(\lambda) = 2.7959 + 0.139916\,L + 0.019681\,L^2 - 9.34456 \times 10^{-5}\,\lambda^2 - 1.32878 \times 10^{-7}\,\lambda^4 + 8.37248 \times 10^{-11}\,\lambda^6$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 13.6 |
|---|---|
| TCE 100/300°C (10-6/K) | — |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | 0.32 |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[8.37 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 4.84 |
|---|---|
| Relative Cost | 500.0 |
Mechanical Properties
| Young's Modulus (GPa) | 22.0 |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | 164.0 |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | — |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Infrared optical glass