A Novel Method for Measuring, Collimating, and Maintaining the Spatial Pose of Terminal Beam in Laser Processing System Based on 3D and 2D Hybrid Vision

The terminal beam collimation problem of laser processing systems has traditionally been a headache. The deflection of the terminal beam seriously affects the processing accuracy and success. In this article, A novel method for measuring, collimating, and maintaining the spatial pose of the terminal beam in a five-axis laser processing system based on 3-D and 2-D hybrid vision is proposed. The beam pose in the working space of the laser processing system is measured by using a 3D scanner and an alignment sensor. The functional relationship between the galvanometer coordinates and the deflection angles of the terminal beam is established. The coordinates corresponding to the minimum deflection angle are solved to collimate the beam. Moreover, a camera is used to monitor the laser spot and re-collimate the deflected beam. The experimental results show that the method proposed in this article can effectively measure the deflection angle of the terminal beam, collimate the terminal beam and monitor the spot position of the terminal beam. The method can effectively improve the processing accuracy when applied to the laser processing system and has excellent potential application value.