Laser marking in China is often seen in industrial production. Its laser marking technology can be divided into scanning mark and mask mode according to its working mode.

Below, let's take a look at the laser Xiaobian.

1. scan type marking

The scanning marking system consists of three parts of a computer, a laser and a X-Y scanning mechanism. The principle of the system is to input the information that needs the marking to the computer. The computer controls the laser and the X-Y scanning mechanism according to the pre designed program, so that the high energy laser points, which are transformed by the special optical system, are scanned on the machined surface. Exercise, form a mark.

2. mask pattern marking

The masking mode is called the projection type marking. The mask marking system consists of a laser, a mask and an imaging lens, and its working principle, through a telescope expanded laser, is evenly projected onto a pre made mask, and light is transmitted from the carvings. The pattern on the mask is imaged through the lens to the workpiece (focal plane). A mark is usually formed by each pulse. The surface of the material that is heated by laser is rapidly heated or vaporized or produces chemical reactions. CO2 laser and YAG laser are commonly used for mask mode marking. The main advantage of mask mode marking is that a laser pulse can produce a complete mark including several symbols at a time, so the marking speed is fast. For large quantities of products, they can be directly marked on the production line. The disadvantage is poor flexibility in marking and low energy utilization.

It uses a few small lasers to emit pulse at the same time, and after the mirror and the focusing lens, a few laser pulses are ablated (melted) on the surface of the marking material to produce small pits of size and depth. Each character and pattern is made up of these small round black pits, usually 5 points in a horizontal stroke and 7 points in a vertical stroke. In order to form an array of 5 * 7. The array type marking usually uses a small power RF excited CO2 laser, and its marking speed can reach 6000 characters / wonderful. Thus, it becomes an ideal choice for high speed online marking. Its disadvantage is that it can only mark the dot matrix characters and can only reach 5 * 7 resolution, so it is incapable of Chinese characters.