The D25.4X4 Lens BesCutter Optical Protective is a vital component for high-power BOCI fiber laser cutting systems. This crystal lens, with a 25.4mm diameter and 4mm thickness, is engineered to shield the laser head’s internal optics from debris and contamination during cutting operations. Designed for compatibility with BOCI BLT520H and BLT642H laser heads, it handles up to 15000W of laser power. The inclusion of a dual-sided anti-reflective coating minimizes energy loss, ensuring efficient laser beam transmission and prolonging the life of critical optical elements.