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ALKOR Technologies - your CRYSTAL optics supplier.
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ZINC SELENIDE: ZnSe windows, wedges and ZnSe lenses

Alkor Technologies - manufacturer of ZnSe windows, ZnSe lenses, ZnSe ATR prisms and custom Zinc Selenide optical components.

ZnSe windows catalog
ZnSe wedges catalog
ZnSe plano-convex lenses catalog
ZnSe meniscus lenses catalog
ZnSe ATR prisms
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The transmission range of Zinc Selenide (CVD ZnSe) is 0.5 - 20 m. CVD ZnSe used for high power CO2 laser optics at 10.6m, for protective optical windows or optical elements in FLIR thermal imaging equipment, optics for medical and industrial applications. We offer ZnSe windows (plates, disks, blanks), ZnSe wedged windows, ZnSe meniscus, ZnSe spherical and cylindrical lenses, ZnSe prisms.

ZnSe windows

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.

Zinc Selenide (ZnSe) - transparent in wide spectral range from yellow (visible) to far IR. ZnSe material is a chemically inert, non-hygroscopic and highly pure product that is very effective in many optical applications due to its extremely low bulk losses, high resistance to thermal shock and stability in virtually all environments, easily machined.

ZnSe Transmision

To obtain superior transmittance, ZnSe crystals are grown by Chemical Vapor Deposition process (CVD). Zinc Selenide CVD is polycrystalline material, demonstrates superior CO2 laser transmittance and is employed in the transmission optical components used in CO2 laser processing.;

ZnSe prisms, ZnSe IR optics

ZnSe (Zinc Selenide) Chemical Vapor Deposition (CVD) material is produced by synthesis from zinc vapor and H2Se gas, forming as sheets on graphite susceptors (ZnSe-CVD processes). Chemical purity of CVD-ZnSe 99.999%. It has a polycrystalline structure; the grain size of Zinc Selenide CVD material is controlled to produce maximum strength and machinability.

ZnSe 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 refractive index

m No m No m No
0.54 2.6754 0.58 2.6312 0.62 2.5994
0.66 2.5755 0.7 2.5568 0.74 2.5418
0.78 2.5295 0.82 2.5193 0.86 2.5107
0.90 2.5034 0.94 2.4971 0.98 2.4916
1.0 2.4892 1.4 2.4609 1.8 2.4496
2.2 2.4437 2.6 2.4401 3.0 2.4376
3.4 2.4356 3.8 2.4339 4.2 2.4324
4.6 2.4309 5.0 2.4295 5.4 2.4281
5.8 2.4266 6.2 2.4251 6.6 2.4235
7.0 2.4218 7.4 2.4201 7.8 2.4183
8.2 2.4163 8.6 2.4143 9.0 2.4122
9.4 2.4100 9.8 2.4077 10.2 2.4053
10.6 2.4028 11.0 2.4001 11.4 2.3974
11.8 2.3945 12.2 2.3915 12.6 2.3883
13.0 2.3850 13.4 2.3816 13.8 2.3781
14.2 2.3744 14.6 2.3705 15.0 2.3665
15.4 2.3623 15.8 2.3579 16.2 2.3534
16.6 2.3487 17.0 2.3438 17.4 2.3387
17.8 2.3333 18.2 2.3278