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.
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 |
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Optical Manufacturing Capabilities
Learn about the vertically integrated capabilities for material growth, fabrication, coating, and assembly, and rigorous QA at Coherent. Discover how these ensure the performance and reliability of our optics and minimize supply chain risks and uncertainties.
