ZnS Window BBAR(3 - 12µm)

This optical window is manufactured from high-purity CVD Zinc Sulfide (ZnS) substrate, with precision double-sided broadband anti-reflective (AR) coating optimized for the 3 – 12 μm infrared spectrum.
Uncoated ZnS has a refractive index of 2.2 at 10 μm, resulting in significant Fresnel reflection loss at each surface. Our 3-12μm BBAR coating effectively reduces surface reflectance to below 1.5% per surface, boosting average transmission to over 94% across the working band. The coating exhibits good adhesion and environmental stability, suitable for long-term operation in industrial and field environments.

Typical Applications

• Thermal imaging cameras and infrared night vision systems
• MWIR / LWIR infrared detection and sensing equipment
• CO₂ laser processing systems and laser power delivery optics
• Fourier transform infrared spectroscopy (FTIR) instruments
• Industrial IR temperature measurement and thermal monitoring
• Aerospace and defense infrared window assemblies