This biconvex collimating lens is a high-precision optical component engineered to transform divergent light from the fiber laser source into a perfectly parallel, non-diverging beam. Designed to fit original RayTools laser heads (such as BM110, BM111, and BT240S), this 30mm diameter lens with a 100mm focal length handles power outputs up to 3.3 kW. Made from premium fused silica, it ensures maximum structural integrity and minimal thermal distortion of the laser beam before it reaches the focusing assembly.