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Zinc Selenide Windows ZnSe
Zinc Selenide Window ZnSe is an optical window with excellent infrared wide spectrum transmittance and high laser damage threshold. Coligh manufactures large-size zinc selenide windows <1000mm and supports customization of any shape.
- High transmittance in the 0.5μm-15μm band, suitable for MWIR and LWIR
- Low absorptivity and high laser damage threshold
- Mohs moderate hardness. High-precision CVD preparation process <1000mm processing of any size and shape
- Full-band anti-reflection film (AR) customization
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Zinc Selenide Windows Description
As a manufacturer of Zinc Selenide Windows, Coligh is speclialized in providing high quality ZnSe windows.
- The ZnSe windows we produce have good wide infrared transmittance, 1. 0.5-15μm full band coverage: high transmittance >70% from the edge of visible light to far infrared (especially 2-20μm mid-to-far infrared), especially suitable for CO₂ laser and thermal imaging
- Absorption rate at 10.6 μm wavelength <0.001 cm⁻¹, laser damage threshold up to 5 J/cm² (10.6 μm pulse), supporting long-term stable operation of high-power lasers.
- We have ultra-precision processing capabilities and can produce large-size, highly uniform zinc selenide with a diameter of <1000mm, supporting non-standard sizes and arbitrary shapes within this range
- In addition to uncoated substrate materials, we can also provide full-band anti-reflection coating solutions and functional enhancement coating solutions.
Zinc Selenide Windows Detail Display
Zinc Selenide Optical Windows Technical Datasheet
| Parameter | Typical Value / Range |
| Transmission Range | 0.5–15 μm |
| Refractive Index (@10.6 μm) | ~2.403 |
| Absorption Coefficient (@10.6 μm) | <0.0005 cm⁻¹ |
| Scattering Loss (@10.6 μm) | <0.1% cm⁻¹ |
| Transmittance (@10.6 μm, 1mm thick, double-sided polished) | >70% |
| Density | 5.27 g/cm³ |
| Color | Light Yellow to Orange (Uncoated) |
| Thermal Expansion Coefficient (20–200°C) | 7.1×10⁻⁶ /K |
| Thermal Conductivity (@20°C) | 18 W/(m·K) |
| Knoop Hardness (HK) | 120–150 HK |
| Young’s Modulus | 70 GPa |
| Poisson’s Ratio | 0.28 |
Optical Zinc Selenide Windows Applications
Zinc selenide (ZnSe) windows have unique advantages in large-scale applications due to their excellent infrared transmission performance (0.5–15 µm), high laser damage threshold and chemical stability. They are mainly used in the following fields:
- Industrial laser processing such as cutting and welding. Medical CO₂ lasers such as surgery and skin treatment, zinc selenide optical windows can support the transmission of high-power laser beams, reduce energy loss and thermal distortion
- In infrared and thermal imaging systems In military and security fields, zinc selenide optical windows can expand the field of view and adapt to complex environments
- In aerospace and satellite optical systems zinc selenide windows can be used as satellite infrared remote sensing payloads, deep space probe windows, missile fairings, etc. to resist radiation and extreme temperatures
- In extreme environmental science experiments such as nuclear fusion devices and combustion diagnosis, zinc selenide windows can be used as observation windows to detect experimental progress
