The difference between green laser and CO2 laser

green laser

Green laser is also a short-wavelength laser. Generally, frequency doubling technology is used to convert the infrared light (1064nm) emitted by the solid-state laser into 532nm (double frequency) green light. Green laser is visible light, and ultraviolet laser is invisible light. . The photon energy of the green laser is very large, and its cold processing characteristics are very similar to those of ultraviolet light, so it can form a variety of types with ultraviolet laser.

The green light marking process, like the ultraviolet laser, is realized by using the photochemical reaction between green light and the material to change the color. Using appropriate parameters can avoid the obvious removal effect on the surface of the material, so it can mark graphics without obvious touch And characters, there is generally a layer of tin masking layer on the surface of the PCB board, usually in many colors, the green laser responds well to it, and the marked graphics are very clear and delicate.

CO2 laser

CO2 is a commonly used gas laser with rich luminous energy levels. The typical laser wavelengths are 9.3 and 10.6um. It is a far-infrared laser with a continuous output power of up to tens of kilowatts. Usually, low-power CO2 lasers are used to achieve high Marking process of non-metallic materials such as molecules. Generally, CO2 lasers are rarely used to mark metals, because metals have a very low absorption rate (high-power CO2 can be used to cut and weld metals, due to factors such as absorption rate, electro-optical conversion rate, optical path and maintenance, fiber lasers have gradually been used. replace).

The CO2 laser marking machine process is realized by using the thermal effect of the laser on the material, or by heating and vaporizing the surface material to expose the deep layer of different colors, or by heating the microscopic physical changes on the surface of the material to make it The reflective performance changes significantly, or certain chemical reactions occur when heated by light energy, and the required graphics, characters, two-dimensional codes and other information are displayed.

CO2 lasers are generally used in electronic components, instruments, clothing, leather, bags, shoes, buttons, glasses, medicine, food, beverages, cosmetics, packaging, electrical equipment and other fields that use polymer materials.