laser beam expander 4times ,1064 nm wavelength Four expansion ratios are available, 4X, 10x, 20x, and 30x Description Four expansion ratios are available, 4X, 10x, 20x, and 30x, each with a means for continuous focus change. As the power increases, the beam divergence decreases proportionately, providing a greater collimation range. These beam expanders can be conveniently attached to most lasers ...