Laser Protective Lenses (Protective Windows)

Laser Protective Lenses / QBH Protective Windows for fiber laser cutting & welding heads — original and compatible options for Raytools, WSX, BOCI, Precitec, Bystronic, etc.

Common sizes: D21.5×2, D22×2, D22×4 (QBH), D24×1.5, D25.4×2, D27.9×4.1, D30×5, D34×4… (check product page for full list)

• Material: fused silica; Coating: high-transmission AR
• Use: protects focusing/colimating optics from smoke & spatter
• Brands: Raytools / WSX / BOCI / Precitec / OSPRI …
• Packing: individual sealed bag; lot & QC label for traceability

Tip: Select by head brand & model and size (Ø × thickness). If unsure, send a photo of the head label and current lens size.