ZnSe Optical Window Explained | CO2 Laser Protective Optics
ZnSe Optical Window Explained
Zinc Selenide (ZnSe) is the most widely used infrared optical material for industrial CO₂ laser systems at 10.6 μm. ZnSe optical windows act as protective barriers, blocking smoke, debris and spatter while maintaining high transmittance for the infrared laser beam.
Key Optical & Physical Properties of ZnSe Windows
| Parameter | Specification & Notes |
|---|---|
| Transmission Range | 0.6 μm ~ 18 μm, optimized for 10.6 μm CO₂ laser |
| Refractive Index @10.6μm | ~2.40 |
| Recommended Coating | AR coating @10.6 μm for >99% transmission |
| Hardness | Soft and scratch-sensitive; requires careful handling |
| Laser Damage Threshold | High for continuous-wave CO₂ laser; avoid surface contamination |
Available Coating Options
- Single-band AR coating for 10.6 μm CO₂ laser (standard choice)
- Dual-band AR coating for 10.6 μm IR + visible red alignment beam
- High-power AR coating for high wattage continuous CO₂ laser machines
Common Failure Causes & Maintenance Tips
- Surface scratches: caused by improper wiping, dirty cloth or hard particles
- Burn spots: contamination from smoke, oil or spatter on the coating surface
- Cleanness rule: only use optical-grade lens paper and isopropyl alcohol for cleaning
- Store ZnSe windows in dry environment; avoid long-term exposure to humid air
Typical Applications
- CO₂ laser cutting machines, laser engravers and laser markers
- Industrial non-metal processing: acrylic, wood, leather, rubber and fabric
- Infrared thermal imaging and FTIR spectroscopy systems
- Laser beam delivery protective optics for OEM laser equipment
Machining Capacity & Quality Control
Felix Glass supplies laser-grade ZnSe optical windows with scratch-dig up to 20/10. We support custom diameter, thickness, plano-plano geometry and precision AR coating. Custom drawings, sampling and bulk orders are accepted.
Datasheet & Custom Inquiry
Send your dimension, laser power and coating requirement for quotation of ZnSe optical windows.
Request Datasheet & Custom Quote
