High-precision protective windows shielding focusing optics from molten spatter, dust, and gas residue. Manufactured from imported fused silica with multilayer anti-reflective coating optimised for fiber laser wavelengths (900–1080nm). Each lens is individually inspected and ships in a dust-free clamshell case with QC report available on request.
Technical Specifications
| Material | Imported fused silica |
| Surface quality | 20/10, 10/5 |
| Transmitted wavefront | < 3λ @ 632.8 nm |
| Diameter tolerance | +0 / −0.127 mm |
| Edge thickness tolerance | ±0.1 mm |
| Clear aperture | 90% of central diameter |
| Reflectance @ 900–1080 nm | < 0.2% R / surface |
| Damage threshold | > 15 J/cm² · 10 ns |
Available Sizes (Diameter × Thickness, mm)
18×2 · 20×2 · 20×3 · 22.35×4 · 24.9×1.5 · 25×2 · 25.4×4 · 26×3 · 26.5×5 · 27×2 · 27.9×4.1 · 28×2 · 30×2 · 30×4 · 30×5 · 34×5 · 36×3 · 36×5 · 37×5 · 37×7 · 38×5 · 40×3 · 40×5 · 42×9 · 50×2 · 50×4 · 50×8 · 53×1.5 · 55×1.5 · 93×3 · 98×2 · 100×3 · 113×3 · 120×5 · 134×3 · 144×3
Additional specifications available on request. Custom sizes possible for orders above 100 pcs.
Send us your head model for exact size confirmation within 6 hours.