RealLight’s RL-BE series laser beam expander can optimize the diameter and divergence of a laser beam. This series consists of 2-4 lenses,which allows a collimated beam output with magnifications from 5x to 20x.RealLight’s beam expanders are designed for 1535nm, 1064nm,532nm and 355nm wavelengths, featuring compact size, low loss, high damage threshold, etc.Straight cylinder connections and flange connections are available. Other magnifications and configurations can be customized upon request.