GST-Series High-Power 1064nm Protective Window Lens (Cover Glass) for Fiber Laser Cutting & Welding Heads, 500W–60kW, AR Coated, Damage Threshold >15 J/cm², Custom Sizes Available

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Presentation of the equipment's characteristics

Greenstone-Tech GST- Protective Window Lens / Protective Glass (1064nm)

The Greenstone-Tech GST- protective window lens (also called a protective glass or window) is designed for fiber laser cutting and laser welding heads. Installed in front of the focusing optics, it blocks spatter, smoke, dust, and flying debris from reaching the expensive focusing lens, helping keep the optical path clean and stable.
With a high-damage-threshold AR coating for 1064nm, it delivers high transmission and low energy loss, supporting consistent processing quality and easier maintenance through quick replacement.

processed samples

  • Protects focusing optics: Prevents spatter and contaminants from damaging the focusing lens, reducing downtime and repair cost.

  • High transmission at 1064nm: AR-coated to improve light throughput and minimize power loss for cleaner, more stable processing.

  • High damage threshold: Built for high-power fiber laser environments with damage threshold > 15 J/cm² (1064nm).

  • Wide power compatibility: Suitable for 500W to 60kW laser systems (application-dependent).

  • Multiple standard sizes + custom machining: Supports common window dimensions and custom sizes on request for different laser heads and setups.

  • Precision manufacturing: Quality substrate and controlled finishing help maintain beam stability and consistent results.

ItemSpecification
Product NameGreenstone-Tech GST- Protective Window Lens / Protective Glass
ApplicationFiber laser cutting heads, laser welding heads (protective window / cover glass)
Lens FunctionShields focusing lens; blocks spatter/debris; supports stable beam transmission
Substrate MaterialHigh-quality quartz crystal
Laser Wavelength1064 nm
Laser Power Range500 W – 60 kW
CoatingHigh-damage-threshold AR coating for 1064 nm
Damage Threshold> 15 J/cm² (1064 nm)
Standard Sizes (OD × Thickness)Ø22.35×4, Ø30×5, Ø34×5, Ø35×4, Ø36×5, Ø37×7, Ø55×9 (mm)
CustomizationOther sizes/specs available on request