Lower Laser Protective Lens for Laser Cutting Head D34x5

✅ Standard size: Φ34.0 × 5 mm, D34.0T5-6 specification, perfectly compatible with Baochu BLT series cutting heads such as the BLT421 and BLT641—plug-and-play
✅ Imported fused quartz substrate, resistant to high temperatures and thermal shock; unlikely to shatter during long-term continuous high-power processing up to 20 kW
✅ Double-sided high-threshold AR hard coating, high transmittance at 1064 nm, low laser energy loss, effectively ensuring cutting stability
✅ Strong coating adhesion resists spatter and scrubbing, reduces burn spots on the lens, extends service life, and minimizes downtime
✅ Precision optical grinding ensures strict dimensional tolerances and excellent flatness, preventing optical path deviation and protecting internal focusing and collimating lenses
✅ Professional laser consumable replacement parts offering high cost-effectiveness; essential stock items for sheet metal fabrication shops

Model: D34.0T5-2

Dimensions: Diameter Φ34.0 mm, Thickness 5.0 mm; Chamfer 0.5 × 45°
Substrate: High-purity fused silica JGS1
Applicable Wavelength: 1064 nm fiber laser
Suitable Power: ≤8 kW fiber laser cutting machine
Optical Coating: Double-sided high damage threshold AR anti-reflective hard coating
Transmittance: 1064 nm > 99.7%, low absorption, low residual reflection
Surface Finish: 40-20 Scratch-Dig
Tolerance: Diameter ±0.05 mm, Thickness ±0.03 mm
Position: Lower Protective Window

Compatible with BLT421S/421TS/BLT510/BLT520

Model: D34.0T5-4

Dimensions: Φ34.0 mm × Thickness 5.0 mm; 0.5 × 45° edge chamfer
Substrate: High-purity JGS1 fused silica
Suitable Laser Wavelength: 1064 nm fiber laser
Suitable Power: ≤15 kW fiber laser cutting machine
Optical Coating: Double-sided high damage threshold AR (anti-reflective) hard coating
Transmittance: 1064 nm > 99.7%, low absorption, low residual reflection
Surface Quality: 40-20 Scratch-Dig
Manufacturing Tolerances: Diameter ±0.05 mm, Thickness ±0.03 mm
Positioning: Lower Protective Window (outer protective lens on the nozzle side)

Compatible with BLT420/420S/421/421T/442/442T/641/641H/642H/520H/640H/643H

Model: D34.0T5-6

Dimensions: Diameter Φ34.0 mm, Thickness 5.0 mm; Chamfer 0.5 × 45°
Substrate: High-purity fused quartz JGS1
Applicable Wavelength: 1064 nm fiber laser
Suitable Power: ≤20 kW fiber laser cutting machine
Optical Coating: Double-sided high damage threshold AR anti-reflective hard coating
Transmittance: 1064 nm > 99.7%, low absorption, low residual reflection
Surface Finish: 40-20 Scratch-Dig
Tolerance: Diameter ±0.05 mm, Thickness ±0.03 mm
Position: Lower Protective Window

Compatible with BLT460f/461/462/461T/462T/661/661H/662H/662MA/560H/462P/663H

Model: D34.0T5-8

Dimensions: Diameter Φ34.0 mm, Thickness 5.0 mm; Chamfer 0.5 × 45°
Substrate: High-purity fused quartz JGS1
Applicable Wavelength: 1064 nm fiber laser
Suitable Power: ≤30 kW fiber laser cutting machine
Optical Coating: Double-sided high damage threshold AR anti-reflective hard coating
Transmittance: 1064 nm > 99.7%, low absorption, low residual reflection
Surface Finish: 40-20 Scratch-Dig
Tolerance: Diameter ±0.05 mm, Thickness ±0.03 mm
Position: Lower Protective Window

Compatible with BLT481/482/681H/682H/682MA/482P/980MA/683H