Laser marking machine principle

2020-10-19 13:35

Laser marking uses a laser or uses an optical fiber to output directly, or uses carbon dioxide as the medium, or uses side pumping or end pumping, or uses third order intracavity frequency doubling technology to form different types of laser beams, which are incident on two reflecting mirrors. (scanning mirror), a computer is used to control the reflection angle of the mirror. These two mirrors can scan along the X and Y axes respectively, thereby achieving the deflection of the laser beam, so that the laser with a certain power density can focus on thecoding material. Move according to the required requirements, and then pass through the field lens to put permanent marks on the

surfaces of various materials.


The marking effect is either through "thermal processing" (a laser beam with a high energy density, which is a concentrated energy flow), which is irradiated on the surface of the material to be processed. The surface of the material absorbs the laser energy and generates thermal excitation in the irradiated area. process, thereby causing the temperature of the material surface (or coating) to rise, causing phenomena such as metamorphosis, melting, ablation, evaporation, etc., or through cold peeling that breaks chemical bonds without causing "thermal damage" side effects, causing the material to undergo abnormal processes. The "cold working" form that destroys the thermal process and does not produce heating or thermal deformation of the inner layer and nearby areas of the processed surface causes the surface material to evaporate to expose the deep material, or it is "engraved" by chemical and physical changes in the surface material caused by light energy. "Leave traces, or use light energy to burn away part of the material to reveal the required etched patterns and characters.


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