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* Low Dispersion
* Available Uncoated or AR Coated
* Ideal for Thermal Imaging, FLIR, and Medical Systems
Wuhan Especial Optics Zinc Selenide Windows (ZnS Windows) are perfect for a wide variety of infrared applications including thermal imaging, FLIR, and medical systems. This chemical vapor deposited material has extensive usage in high power CO2 laser systems because of its low absorption coefficient and high resistance to thermal shock. Zinc Selenide (ZnSe) is a relatively soft material that scratches easily, and it is not recommended in harsh environments because its Knoop Hardness is only 120. When handling, apply uniform pressure and wear Latex finger cots or gloves to prevent contamination.
The desired spectral range can be achieved by using different dichroic filters.

Note: Special care should be taken when handling Zinc Selenide as it is a toxic material. Always wear rubber or plastic gloves to avoid the risk of contamination.
* Uncoated or with AR Coatings Designed for a Variety of IR Ranges
* Minimal Chromatic Aberration Due to Low Dispersion
* Ideal for Infrared Applications Requiring Rugged Optics
Wuhan Especial Optics Germanium Windows are available off-the-shelf with three anti-reflection coating options: 3 - 5μm for mid-infrared applications, 3 - 12μm for broadband multispectral applications, or 8 - 12μm for thermal imaging applications. Due to its high index of refraction (around 4.0 from 2 - 14μm), an anti-reflection coating is recommended for these germanium windows for sufficient transmission in the region of interest. Germanium is subject to thermal runaway, meaning that the transmission decreases as temperature increases. As such, these germanium windows should be used at temperatures below 100°C. Germanium's high density (5.33 g/cm3) should be considered when designing for weight-sensitive systems. The Knoop Hardness of germanium (780) is approximately twice that of magnesium fluoride, making it ideal for infrared applications requiring rugged optics.
Material | ZnSe |
Diameter | As request |
Thickness | 1-10mm |
Thickness tolerance | ±0.1mm |
Surface Quality | 60-40 40-20 20-10 |
Bevel | 0.2-0.4mmx45deg |
Coating | AR coating |
Clear Aperture | ≥90% |
Surface accuracy | λ/2 λ/4 λ/10 |


a: Dimesion size : 5-300mm , thickness up to customer requirements
b: Many material could be choosed, like BK7, Fused Silica, Sapphire, MgF2, CaF2, Ge, Si, Znse, ZnS and so on.
c: AR HR DLC coating or as your request
For more please visit our website: www.wheo.cn

Packing Details: Protective film or Capacitor paper,Pearl cotton,Cardboard box.
Delivery Details: 7 days for stock.
3-4 weeks for custom-made products for sample.
in common, 4 weeks for mass production

What's the way of shipping?
We commonly use UPS, FedEx, DHL, TNT, SF, EMS etc. If you have your own express account, it's great.
How to pay?
We usually draft Trade Assurance Order on Alibaba, you can pay by the most convenient way which also protect most of your rights.
What's the deliver time?
For inventory: the delivery time is around 5 workdays.
Customized products: the delivery time is 10 to 30 workdays. According to the quantity and precision.
How to ensure the safety of payment?
Wuhan Especial Optic.,INC is the gold supplier and supports Alibaba Trade Assurance. Payment<=5000USD, 100% in advance. Payment>5000USD, 50% T/T in advance, balance before shippment.
Can I customize the products based on my need?
Yes, we can customize the material, specifications and optical coating for your optical components based on your needs. OEM is available.
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