This high-quality optical protective glass, with a diameter of 37 mm and a thickness of 1.6 mm (JGS1 Fused Silica), is a specialized UPPER protective element used in high-power fiber laser heads. Positioned high in the optical path (above the collimating lens), this glass serves as a barrier protecting key components from dust and microparticles that could enter the head during assembly or replacement of the fiber optic connector. Thanks to its precise geometry and minimal thickness, this component does not affect beam quality even under extreme industrial loads.

The use of advanced, multi-layer anti-reflective (AR) coatings with a high optical damage threshold reduces energy loss to an absolute minimum. This prevents thermal lensing and ensures full stability of the focal position during continuous cutting at powers up to 15,000 W. This standard is fully compatible with modern fiber cutting heads from Raytools, WSX, and Precitec, which are used in CNC cutting machines from leading manufacturers.