D30 ET5 Protective Window 1090nm 20 kW for Fiber Laser Cutting Heads (10 pcs)

d30 × et5 mm protective window for fiber laser cutting heads rated up to 20 kw. the 1090 nm fused silica window takes the spatter, fumes and dust from the cut so the focusing optics behind it stay clean.

size:

• diameter (d): 30 mm
• thickness (et): 5 mm
• pack: 10 × protective window

spec:

• ar coating optimised for 1090 nm fiber laser systems
• power rating: up to 20 kw in a clean, correctly aligned cutting head
• 5 mm thickness gives good stiffness and flatness under assist-gas pressure
• parallel, flat faces keep focal position and beam quality stable

material:

• fused silica (quartz) optical glass
• low absorption at fiber laser wavelengths, limiting thermal lensing
• durable ar coating on both faces

use:

• protective window in fiber laser cutting heads
• shields the focus lens from dust, fumes and metal spatter
• extends focus lens life and reduces unplanned cleaning stops

compatibility:

• for fiber laser cutting heads that use round d30 mm × et5 mm protective windows
• always confirm your original window diameter and thickness before ordering

quality:

• surface quality and coating checked before packing
• diameter and thickness verified against the marked size
• sealed packaging against dust and fingerprints