Product Description
Large 100mm AR-Coated Zinc Selenide (ZnSe) Window for CO₂ Lasers – Defense Surplus
This is a high-performance, transmissive optic crafted from premium Zinc Selenide (ZnSe)—the industry standard material for high-power CO₂ laser systems operating at 10.6 µm. Sourced from U.S. Defense laboratory surplus, this large-format, AR-coated window offers professional-grade infrared transmission at a fraction of its original cost.
Key Specifications:
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Material: High-purity Zinc Selenide (ZnSe) crystalline substrate
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Diameter: 100 mm (≈4 inches)
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Thickness: 8 mm (provides thermal stability and high laser damage threshold)
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Coating: Dual-side Broadband Anti-Reflection (AR) – optimized for 10.6 µm (<0.5% loss per surface typical)
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Figure: Plano-Plano (flat, parallel surfaces)
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Spectral Range: Excellent transmission in Mid/Far-IR (2–14 µm); naturally blocks visible/blue light (longpass filter effect)
Why This ZnSe Window Is Exceptional Value:
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Cost Savings: New equivalents retail for $1,500–$3,000+. This surplus optic delivers identical performance.
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Proven Durability: Originates from U.S. Defense laser R&D, built to withstand demanding high-power applications.
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Large Format: 100mm diameter provides generous beam clearance for industrial and hobbyist CO₂ laser setups.
Applications:
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CO₂ Laser Systems: Protective output window, debris shield, or beam diagnostics in cutters, engravers, and markers.
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Industrial/Research Optics: Component in high-power IR beam delivery, sensor windows, or thermal imaging systems.
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Hobbyist & DIY Upgrades: Perfect for enhancing homebuilt CO₂ laser cutters (e.g., K40 machines).
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Spectroscopy & Sensing: Window for FTIR or other mid/far-infrared analytical instruments.



