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Znse Windows | Sherlan Optics

Infrared Optics, Windows
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ZnSe Window

Zinc Selenide is used for optical windows, lenses, mirrors and prisms particularly for infrared applications. The transmission range is 0.5 μm – 22 μm. Used for high power CO2-laser optics at 10.6 microns. Zinc Selenide is produced by synthesis from zinc vapour and H2Se gas, forming as sheets on graphite susceptors.

The transmission range of Zinc Selenide (CVD ZnSe) is 0.5 – 20 µm. CVD ZnSe used for high power CO2 laser optics at 10.6µm, for protective optical windows or optical elements in FLIR thermal imaging equipment, optics for medical and industrial applications.
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.


Factory Standard – Contact us for manufacturing limit or custom specifications.

  • Material: ZnSe
  • Irregularity (fringe): l/4
  • Diameter Tolerance: +0.0, -0.05mm
  • Thickness Tolerance: +/- 0.1mm
  • Clear Aperture: >85%
  • Parallelism: 5 arc min
  • Surface Quality: 40-20
  • Wavefront Distortion: l/4 per 25mm

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    Sherlan Optics
    Tel: 86-431-89235797
    Add: Boxue Road, Changchun, China