Optics
Zinc Selenide (ZnSe)
Fabricate high-quality lenses, windows, output couplers, beamsplitters, and other optics with ZnSe produced by a leading manufacturer of the material.
ZnSe offers high uniformity and homogeneity for imaging uses and low absorption and scatter for high-power laser applications; its visible light transmission simplifies optical system alignment. ZnSe is also non-hygroscopic and chemically stable.
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Zinc Selenide (ZnSe) Characteristics
Coherent routinely supplies ZnSe substrates up to 300 mm, and can provide sheet material, core-drilled blanks, edged blanks, generated curved lens blanks, and more.
ZnSe Material Properties (at 20°C) |
|
Physical Properties |
|
Structure |
Cubic zincblende |
Density |
5.27 g/cm³ |
Grain Size |
< 100 μm |
Inclusions |
None > 0.05 mm |
Electrical Density |
> 1012 ohm-cm |
Optical Properties |
|
Bulk Absorption Coefficient @ 10.6 μm |
< 0.0005 cm-1 |
Thermo-Optic Coefficient (dn/dT) @ 10.6 μm |
6.1 x 10-5/°C |
Refractive Index Inhomogeneity @ 0.6328 μm |
< 3 x 10-6 |
Thermal Properties |
|
Thermal Conductivity @ 20° C |
0.18 W/cm/°C |
Specific Heat |
0.356 J/g/°C |
Linear Expansion Coefficient @ 20° C |
7.57 x 10-6/°C |
Mechanical Properties |
|
Young’s Modulus |
67.2 GPa (9.75 x 106 psi) |
Rupture Modulus |
55.1 MPa (8,000 psi) |
Knoop Hardness |
105-120 kg/mm² |
Density |
5.27 g/cm³ |
Poisson’s Ratio |
0.28 |
Fracture Toughness |
0.5 x 106 N/m1.5 |
