Zinc Selenide (ZnSe) Window – Custom Infrared Optics
High-performance ZnSe Windows for IR Applications | Custom Sizes Available
Bote Optical specializes in precision-engineered Zinc Selenide (ZnSe) windows. Designed for high transmission in the infrared spectrum, our ZnSe optics are ideal for thermal imaging, CO₂ laser systems, and FTIR spectroscopy. Custom coatings, sizes, and shapes are available to meet your specific needs.
What is a Zinc Selenide Window?
A Zinc Selenide (ZnSe) window is an optical flat made from ZnSe crystal, known for its excellent transparency in the 8–12 μm infrared range. It is commonly used in IR systems where high transmission and low absorption are required.
ZnSe windows are yellow to orange in color, non-hygroscopic, and chemically stable in normal atmospheric conditions.
Key Properties of Zinc Selenide
| Property | Value |
|---|---|
| Material | Zinc Selenide (ZnSe) |
| Transmission Range | 0.6 – 20 μm |
| Refractive Index @ 10.6 μm | 2.403 |
| Density | 5.27 g/cm³ |
| Hardness (Knoop) | 120 kg/mm² |
| Thermal Expansion | 7.57 × 10⁻⁶ /°C |
| Surface Finish | Up to 20-10 scratch-dig (customized) |
ZnSe is ideal for high-power CO₂ laser applications due to its low absorption at 10.6 μm and high resistance to thermal shock.
Light Transmission of Zinc Selenide
Zinc Selenide offers high transmission from visible to far-infrared regions. The transmission is typically over 70% from 0.8 μm to 14 μm, with peak transmission exceeding 90% between 8 μm and 12 μm.
Zinc Selenide Transmission Spectrum
Typical ZnSe transmission spectrum (uncoated sample)
With anti-reflective (AR) coatings, transmission can reach over 95% at specific wavelengths. Coatings can be optimized for 3–5 μm, 8–12 μm, or other custom bands.
ZnSe Refractive Index
The ZnSe refractive index varies slightly across the spectrum. At 10.6 μm, it is approximately 2.403, which makes it a good choice for use in infrared laser systems, ensuring minimal beam distortion.
Applications
- Thermal imaging cameras
- CO₂ laser cutting and welding systems
- FTIR (Fourier-transform infrared) spectroscopy
- Gas detection and sensing
- Military and aerospace optics
Custom Zinc Selenide Windows – Made to Your Specifications
At Bote Optical, we provide fully customized ZnSe windows, including:
✅ Diameter: 5mm to 100mm+
✅ Thickness: As per request
✅ Surface flatness: λ/10 to λ/2
✅ Coating: AR, DLC, BBAR, or custom multilayer
✅ Shape: Round, rectangular, elliptical, wedge
We work closely with clients to ensure optimal performance for your exact application. Small batch production and prototypes are welcome.
Zinc Selenide MSDS (Material Safety Data Sheet)
Zinc Selenide is stable under normal handling. However, like all selenium compounds, care should be taken during processing.
- Non-toxic under normal use
- Avoid inhaling dust during grinding or polishing
- MSDS available upon request
Why Choose Bote?
🌏 Based in Singapore, we serve customers worldwide with precision optical components and custom manufacturing services.
✔ Over 15 years of experience
✔ ISO-compliant manufacturing
✔ Fast delivery & reliable quality
✔ Dedicated engineering support
Need a specific size, coating, or surface requirement? We’ve got you covered.
Request a Quote
Ready to order or need technical support?
📩 Email: [email protected]
🌐 Website: www.bote.com.sg
We respond within 24 hours. Let us help you build better infrared systems with precision ZnSe optics.
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