RayTools Fiber Laser Protective Windows (Upper and Lower) | Quartz Fused Silica Genunine RayTools Replacement Part. Maximum Transmittance. Industrial Durability. Designed specifically for the RayTools BM110, BM111, and BT240 series, these protective windows are crafted from premium Quartz Fused Silica (JGS1/JGS2). With a high-efficiency anti-reflective coating, they achieve over 99.7% laser transmittance, ensuring your beam retains full power, for clean, precise cuts without thermal deformation. Key Features Ultra-High Clarity: Optimized for the 1064nm wavelength, these lenses offer superior optical clarity to prevent beam deflection or scattering. High Power Capacity: Engineered to handle laser powers up to 4kW and withstand high-pressure gas environments up to 30 bar. Double-Sided AR Coating: Features a high damage threshold coating that resists chemical corrosion and protects the glass from high-energy laser impact. Quick-Swap Design: Fully compatible with the BM110’s drawer-type lens mount, allowing for rapid replacement to minimize machine downtime. Thermal Stability: Exceptional heat resistance prevents cracking and maintains stable performance during long-term irradiation. Technical Specifications Lower Protective Lens Dimensions: φ27.9mm x 4.1mm Material: Quartz Fused Silica (JGS1) Wavelength: 1064nm Transmittance: >99.76% Coating AR/AR:@ 1064nm Compatibility: BM110, BM111, BT240 BM110, BM111 Upper Protective Lens Dimensions: φ24.9mm x 1.5mm Material: Quartz Fused Silica (JGS1) Wavelength: 1064nm Transmittance: >99.76% Coating AR/AR: @ 1064nm Compatibility: BM110, BM111, BT240 BM110, BM111