HWS9 by CDGM

Standard Rare Environmentally Dangerous

HWS9 by CDGM is a standard optical glass with a rare melt frequency. It transmits from 2.50 to 15.50 µm. It has extreme relative cost and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 2.0–12.0 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 2.0–12.0 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 2.500–15.500 µm
Optical Properties
Refractive Index (nd) —
Abbe Number (Vd) —
Dispersion Formula Herzberger
Wavelength Range 2.0 — 12.0 µm
$$L = \frac{1}{\lambda^2 - 0.028} n(\lambda) = 3.2987 + 0.303047\,L + 0.150428\,L^2 - 7.781 \times 10^{-5}\,\lambda^2 + 8.97439 \times 10^{-8}\,\lambda^4 - 3.70211 \times 10^{-10}\,\lambda^6$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0.0001061 + 2(1.824 \times 10^{-8})\,\Delta T + 3(-6.434 \times 10^{-10})\,\Delta T^2 + \frac{0.0002092 + 2(1.418 \times 10^{-8})\,\Delta T}{\lambda - 0.1904}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 5.4
Relative Cost 388.6
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) 118.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

Infrared optical glass

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