For the light path of the cutting machine, since the beam divergence angle, the proximal and distal cutting different time length is short, there are some differences before the focus of the beam size. The larger the diameter of the incident beam YAG laser machine parts, the smaller the diameter of the focus spot. In order to reduce the beam size changes due to changes in focus before bringing the focus spot size of YAG laser machine products, domestic and foreign manufacturers of laser cutting system provides a number of specialized devices for users to choose: (1) collimator. This is a commonly used method, i.e. at the output plus a CO2 laser tube is expanded parallel light beam treatment, after the beam diameter of the beam expander is increased, the divergence angle becomes small, so that the proximal end and the distal end of the cutting work range focused beam size before nearly identical. (2) adding a separate lower shaft moving the lens in the cutting head, it controls the nozzle to material surface distance (stand off) of the Z-axis is two independent parts. When moving the machine table or the optical axis, the beam from the proximal to the distal end of the shaft F also move, after focusing the beam spot diameter is consistent throughout the processing area. Figure two shows. (3) controlling the focus lens (typically metal reflective focusing system) of water pressure. If the focused beam size before leaving the smaller focal spot diameter becomes large, the automatic focusing control pressure to change the curvature of the focal spot diameter becomes smaller. (4) increase in x, y direction compensating optical system on the light path of the cutting machine. Even when the distal end of the optical path to increase the cutting compensation optical path shortening; conversely YAG laser cutting machine when the proximal end of the optical path decreases, so that the compensation optical path is increased to be consistent optical path length. Laser marking machine can be divided according to different lasers: CO2 laser marking machine YAG laser machine manufacturers, semiconductor laser marking machine, YAG laser marking machine, fiber laser marking machine. According to the laser visibility divided into: UV laser marking machine (not visible), green laser marking machine (visible laser), an infrared laser marking machine (not visible laser), in accordance with the laser wavelength by wavelength can be divided into: deep UV laser marking machine (266 nm), green laser marking machine (532nm), lamp-pumped YAG laser marking machine (1064nm), the semiconductor side pump YAG laser marking machines, semiconductor end pump YAG laser marking machine (1064nm) fiber laser marking machine (1064nm), CO2 laser marking machine (10.64um). Shandong YAG laser machine, YAG laser machine, provided by Qingdao Tianrun High Frequency Electric Co., Ltd. Qingdao Tianrun High Frequency. Qingdao Tianrun High Frequency Electric Co., Ltd. (www.gaozhoubo.com.cn) strong, credible, in Qingdao, Shandong packaging related equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qingdao Tianrun High Frequency and you hand into the brilliant, for a better future!