The amplifiers are the lens assemblies that can change the diameter and divergence Angle of the laser beam. From laser divergence Angle of laser beam has a certain, for laser processing, it is only through the adjustment of the beam expander make laser beam collimation (parallel) beam, to achieve a small high power density using the focusing lens flare; In laser ranging, it is necessary to improve the accuracy of the laser to achieve the desired long distance measurement. The diameter of the beam can be changed by the beam-expanding mirror to be used for different optical instruments; The distribution of asymmetric beams can be changed to symmetrical distribution and the distribution of light energy is more uniform.
