ULO Optics FT-CL collimator comes in several focal lengths
An adjustable focus FT-CL collimator is available in both 25 and 50 mm diameters, and is used with fiber lasers up to 10 kW continuous-wave power. It has two water-cooled optical components made from fused silica with an AR/AR coating for 1.07 μm, comes in several focal lengths, and includes a QBH fiber connector.
ULO Optics
Herts, England