D48 ET3 Protective Window 1090nm 20 kW for Fiber Laser Cutting Heads (10 pcs)

48 × 3 mm protective lens for fiber laser cutting rated up to 20 kw. an ar-coated 1090 nm fused silica window that shields the lens stack from process debris and reduces unplanned cleaning stops.

size:

• diameter (d): 48 mm
• thickness (et): 3 mm
• pack: 10 × protective window

spec:

• ar coating optimised for 1090 nm fiber laser systems
• power handling: 20 kw with a properly maintained head
• 3 mm thickness gives good stiffness and flatness under assist-gas pressure
• precise thickness and surface flatness for stable cutting performance

material:

• optical-grade fused silica
• low bulk absorption keeps the window cool in the beam path
• ar-coated surfaces to minimise reflection losses

use:

• protective window in fiber laser cutting heads
• shields the focus lens from dust, fumes and metal spatter
• keeps cut quality consistent between maintenance intervals

compatibility:

• for fiber laser cutting heads that use round d48 mm × et3 mm protective windows
• measure your existing window before ordering; diameter and thickness must match

quality:

• diameter and thickness tolerance checked per batch
• coating inspected for uniformity
• individually wrapped to protect the optical surfaces