Laser is a kind of light. Like other natural light, it is produced by atom (molecule or ion) transition. However, it is different from ordinary light in that the laser only depends on spontaneous emission in the first very short time, and the subsequent process is completely determined by the excitation radiation. Therefore, the laser has a very pure color, almost no divergence direction, high luminous intensity and high coherence.
Laser cutting is realized by using the high power density energy produced by laser focusing. Under the control of the computer, the laser is discharged by pulse, so as to output the controlled repetitive high frequency pulse laser, forming a beam with a certain frequency and a certain pulse width. The pulse laser beam is conducted and reflected through the optical path and focused on the surface of the processed object through the focus lens group, forming a fine, high-energy density spot near the surface to be processed, To melt or vaporize the processed…