134mm Laser Protection Window Laser Protective Lens with AR Coating

134mm Laser Protection Window Laser Protective Lens with AR Coating

134×3mm Laser Protection Window – High-damage-threshold optical window designed for protecting focusing lenses in high-power fiber and CO₂ laser systems.

Features low-absorption AR coating, excellent parallelism, and durable fused silica substrate.

Description

Specifications

Diameter: 134 mm

Thickness: 3 mm

Substrate Material: Fused Silica / Quartz

Wavelength: 1064 nm / 1030 nm / 915 nm (customizable)

Coating: AR-coated both sides, R<0.2% per surface

Damage Threshold: >15 J/cm² @ 1064 nm, 10 ns

Surface Quality: 40-20 scratch-dig (MIL-PRF-13830B)

Parallelism: ≤0.05 mm

Clear Aperture: ≥90% of diameter

Application: Fiber laser cutting / welding / marking heads

Product Description

134×3mm Laser Protection Window – Precision Protection for High-Power Lasers

Shield your expensive focusing optics with our 134mm diameter, 3mm thick laser protection window. Precision-ground from high-purity fused silica and coated with broadband anti-reflection layers, this window delivers:

Minimal insertion loss – AR-coated both sides for R<0.2%
High thermal stability – low expansion fused silica substrate
Long service life – high damage threshold resists laser-induced degradation
Drop-in replacement – standard size fits most laser cutting heads

Ideal for fiber laser systems operating at 1064nm, 1030nm, or 915nm. A cost-effective consumable optic that maximizes uptime and protects your main lens investment.

Keywords: 134mm laser protection window, 3mm laser window, laser debris shield, fiber laser consumable optics, 1064nm AR coated window, laser cutting head protection glass.