Quartz window protective lens for Laser Engraving Cutting Machine 20 ×3 mm
Material: Quartz
Diameter tolerance: ± 0.01 mm
Thickness Tolerance: ± 0.01 mm
Light wavelength: 1064 nm
Transmittance: 99.998%
Light diameter: <50%
Coating: double-sided high damage threshold of the anti-reflective film, single-sided residual rate R< 0.5% @ 1047-1064nm, the incident angle of 0 degrees, damage threshold> 15J / cm2,