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Alkor Technologies - manufacturer of CVD ZnSe optical components.
ZnSe windows catalog
ZnSe lenses catalog
ZnSe prisms
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We work with 3 Russian manufacturers of ZnSe material, this allows us to offer one of the best price-leadtime-quality ratio on international ZnSe market.
Zinc Selenide is used for infrared windows, lenses and prisms where transmission in the range 0.58mkm to 22mkm is desired . The refractive index is near 2.4. Zinc Selenide has a very low absorbtion coefficient and is used extensively for high power infrared laser optic. It is non-hygroscopic.
We produce two kinds of CVD grown ZnSe (Zinc Selenide) material:
- CVD ZnSe laser grade, grain size 50-70 microns, index of absorption 0.0005 (1/cm) at 10.6 microns, optical component dimensions 3–100 mm, thickness 20mm, used in high power CO2 laser optics, in medical applications.
- CVD ZnSe IR optical grade, grain size 20-100 microns, index of absorption 0.003 (1/cm) at 10.6 microns, optical component dimensions 3-300 mm, thickness 20mm, used in protective windows and thermal imaging equipment, in industrial applications.
ZnSe laser grade material price is higher than IR optical grade price.
Spectral transmittance (T) of ZnSe laser grade uncoated polished window (thick. 2mm), range (2.5–20) microns. For visible range T greater than or equal to 62% at 633 nm.
Spectral transmittance (T) of Zinc Selenide IR optical grade uncoated polished window (thick. 2mm), range (2.5–20) microns.
Zinc Selenide is a relatively soft material and scrathes rather easily. The low absorbtion of the material avoids the thermal runaway problem of Germanium. Zinc Selenide windows and lenses requires an anti-reflection coating due to its high refractive index if high transmission is required.
| ZnSe material properties |
| Chemical Formula |
ZnSe |
| Molecular Weight |
144.33 |
| Crystal Class |
Cubic, hexagonal |
| Crystal Structure |
Polycrystalline |
| Density, g/cm3 at 293 K |
5.27 |
| Melting Temperature, K |
1790 |
| Thermal Conductivity, W/(m K) at 300 K |
18 |
Thermal Expansion, 1/K
at 173 K
at 273 K
at 473 K |
5.6 x 10-6
7.1 x 10-6
8.3 x 10-6 |
| Specific Heat, cal/(g K) at 296 K |
0.081 |
| Debye Temperature, K |
246 |
| Bandgap, eV |
2.7 |
| Solubility in water at 298 K |
0.001 g/100 g H2O |
| Knoop Hardness, kg/mm2(100 g load) |
105 |
| Young's Modulus, GPa |
70 |
| Bulk Modulus, GPa |
40 |
| Poisson's Ratio |
0.28 |
| ZnSe index of refraction |
| Wavelength, µm |
2.75 |
5.00 |
7.50 |
9.50 |
11.0 |
12.5 |
13.5 |
15.0 |
16.0 |
16.9 |
17.8 |
18.6 |
19.3 |
20.0 |
| Refractive Index |
2.44 |
2.43 |
2.42 |
2.41 |
2.40 |
2.39 |
2.38 |
2.37 |
2.36 |
2.35 |
2.34 |
2.33 |
2.32 |
2.31 |
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