HWS27 by CDGM

Standard Rare Environmentally Dangerous

HWS27 by CDGM is a standard optical glass with a rare melt frequency. It transmits from 0.55 to 13.00 µm. It has extreme relative cost and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.6–12.0 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.6–12.0 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.550–13.000 µm
Optical Properties
Refractive Index (nd) —
Abbe Number (Vd) —
Dispersion Formula Herzberger
Wavelength Range 0.6 — 12.0 µm
$$L = \frac{1}{\lambda^2 - 0.028} n(\lambda) = 2.41743 + 0.0611686\,L + 0.00365064\,L^2 - 0.000270153\,\lambda^2 - 3.02036 \times 10^{-7}\,\lambda^4 - 7.3806 \times 10^{-10}\,\lambda^6$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) 0.482
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.2
Relative Cost 139.2
Mechanical Properties
Young's Modulus (GPa) 16.8
Poisson's Ratio —
Knoop Hardness (kgf/mm²) 111.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

Infrared optical glass

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