Dimensions: 27.9 mm diameter × 4.1 mm thickness

Material: Quartz fused silica (JGS1/JGS2 grade)

Laser Power Rating: Suitable for systems up to 4 kW

Wavelength Compatibility: Optimized for 1064 nm (±900–1100 nm) fiber laser beams

Transmittance:   99.76%, ensuring minimal energy loss

Coating: Advanced anti-reflective coating to enhance durability and reduce laser-induced damage

Application: Serves as an upper protective window in laser cutting heads, particularly compatible with Raytools BT240S and BM111 models

Raytools Original Protective Lens – Size 27.9×4.1 mm | Power Capacity up to 4kW

This original Raytools protective window (27.9×4.1 mm) is designed for use in fiber laser cutting heads and machines, supporting laser power up to 4kW. It provides a high level of protection for your laser optics, shielding internal components from smoke, debris, and splatter during cutting operations.

Sourced directly from certified manufacturers, each lens undergoes strict quality control to meet industry standards. Every unit is tested for durability, clarity, and thermal resistance—ensuring optimal performance and extended service life.

Choose genuine Raytools components for maximum protection, reliability, and cutting precision.

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Note - Please be aware that items can only be returned in the event of damage or alteration.