ZINC SELENIDE (ZnSe) windows and lenses

Alkor Technologies manufactures ZnSe (CVD) optical components: ZnSe windows, ZnSe lenses, ZnSe wedges, ZnSe prisms.

ZnSe transmission

ZnSe transmittance. Sample thickness 10mm.

Please visit our new ZnSe windows catalog.

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.

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.

We offer two types of ZnSe: CVD and PVD (ceramic PO4).
The largest dimensions of ZnSe optics: Dia 100x15mm

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

Refractive Index

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

Tel: +7(812)3631240

Fax: +7(812)3631239

Email: technologies@alkor.net