Laser long-distance focusing assembly

The utility model relates to a laser long-distance focusing assembly, which comprises a beam expanding lens group and an aspherical mirror, and the aspherical mirror is arranged on the light emitting side of the beam expanding lens group. The long-distance focusing device has the beneficial effects that a laser beam emitted by the laser device firstly enters the beam expanding lens group and is expanded by the beam expanding lens group, so that a laser spot is expanded by a certain multiple, the expanded laser beam enters the aspherical mirror, and the expanded laser beam is converged at one point at the far end through the aspherical mirror, so that long-distance focusing is realized; and through the aspherical mirror, the focusing light spot is smaller and the energy density is higher. 本实用新型涉及一种激光远距离聚焦组件，包括：扩束镜组和非球面镜,非球面镜布置在扩束镜组的出光侧。有益效果为：激光器发射的激光束先射入扩束镜组，并由扩束镜组进行扩束，以将激光光斑扩大一定的倍数，扩束后的激光束再射入非球面镜，扩束后的光束通过非球面镜汇聚在远端的一点，以实现远距离聚焦，此外，通过非球面镜使聚焦光斑更小能量密度更高。