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Zinc Selenide(ZnSe) window

Zinc Selenide(ZnSe) optical window
Material	Polycrystalline of Zinc Selenide(ZnSe), Purity: >99.99%
Other Names	Zinc Selenide optical window, ZnSe window, ZnSe IR window, Zinc Selenide IR window
Crystal structure	Polycrystalline
Growth method	CVD (Chemical Vapor Deposition)
Applicable wave band	0.6μm ~ 19μm
Melting Point	1100℃
Knoop hardness	120 kg/mm2
Thermal conductivity	18W/mK at 298K
Coefficient of thermal expansion	7.1 x10^-6/℃ at 273K
Density	5.27 g/cc
Absorption Coefficient	0.0005 /cm at 10.6 μm
Maximum size	Diameter 220mm (Polycrystalline)

Material	Standard Size	Surface quality
Zinc Selenide(ZnSe) window	φ10.0mm x 1.0mm φ20mm x 2.0mm φ25.4mm x 3.0mm φ25.4mm x 5.0mm φ50mm x 1.0mm φ50.8mm x 3.0mm 12.7 x 12.7 x 3.0mm 25.4 x 25.4 x 3.0mm	Polishing: Double side optical-polished Roughness: Ra 5~10nm or Ra<1.5nm, Size Tolerance: +/-0.1mm Thickness Tolerance: +/-0.1mm or +/-0.05mm Parallelism: <3 minute, <1 minute, 30 seconds, 5 seconds or higher Surface Finish: 60-40, 40-20, 20-10 (scratch-dig) Surface Figure: <3λ, λ/2, λ/4 or higher Chamfer: 0.25mm × 45° Coating: Upon requirements

Zinc selenide(ZnSe) is an excellent Infrared optical window and substrate material with a transmission range of 0.5-15um, low dispersion, and not easy to deliquesce. It is very suitable for thermal imaging, FLIR and medical systems. Zinc selenide(ZnSe) window can be used as 10.6um CO2 laser window material and focusing lens material. ZnSe is the most commonly used medium and far infrared window material. It can be used as the carrier material for the 7-14um window band.

Because ZnSe has a low absorption coefficient and a high resistance of thermal expansion coefficient, it is usually used as a substrate material for reflectors and beam splitters in high-power CO2 laser systems. But because ZnSe window is relatively soft (Knoop hardness is 120) and easy to rub, it is not recommended for use in harsh environments. Pay attention to uniform force when holding and cleaning. It is best to wear gloves due to ZnSe is a toxic Substances.

We can customize different size and thickness of Zinc Selenide(ZnSe) optical window upon requirements, such as Zinc Selenide(ZnSe) round wafer, Square substrate and Cylinder, or Punch holes and other shapes.

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Zinc Selenide(ZnSe) window

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