d20 f400 ct3.5mm 1090nm laser welding lens germany material ``

d20 f400 ct3.5 laser welding lens for fiber laser welding heads. high-precision designed for ≈1090 nm fiber laser systems and made from germany-material fused silica to keep the beam stable and welding seams consistent in daily production.

this product is sold as a single laser welding lens (1 pc per order).

size:

• lens type: welding lens for fiber laser welding heads
• lens diameter: d20 mm
• focal length: f400
• center thickness (ct): ct3.5 mm

spec:

• wavelength: optimized for ≈1090 nm fiber laser systems
• beam type: lens for fiber laser welding heads
• designed for stable spot size, good energy density and consistent weld quality over long runs

material:

• high-quality fused-silica optics — germany material
• low absorption in the 900–1100 nm range to reduce thermal stress
• ar-coated surfaces to minimize reflection and power loss

use:

• for handheld and integrated fiber laser welding systems using d20 lenses
• suitable for general metal fabrication, stainless steel, carbon steel, aluminum and repair welding
• helps maintain a clean, stable welding spot with repeatable results

compatibility:

• fits fiber laser welding heads designed for d20 mm round lenses
• always confirm your original lens diameter (20 mm), focal length (f400) and center thickness (ct3.5 mm) before ordering

quality:

• each lens visually inspected before packing
• controlled curvature, thickness and surface quality for repeatable focus
• clean packaging to reduce contamination risk before installation

included:

• 1 × d20 f400 ct3.5mm laser welding lens (one lens per order)

shipping:

• carefully packed in a protective box to avoid damage in transit