Introduction to the classification of Laser-Cleaning technology

Laser-Cleaning technology makes use of the characteristics of the above-mentioned laser to achieve the purpose of cleaning. According to the optical characteristics of the substrate material to be cleaned and the dirt to be cleaned, the Laser-Cleaning mechanism can be divided into two categories:

One is to use cleaning substrates and surface attachments to have a great difference in the absorption coefficient of a certain wavelength of laser energy. Most of the laser energy radiated to the surface is absorbed by the surface attachments, so that it is heated or vaporized and evaporated, or instantly expanded, and is driven by the formed airflow to separate from the surface of the object to achieve the purpose of cleaning. The substrate will not be damaged due to the very small absorption energy of the laser of this wavelength. For this kind of laser cleaning, choosing the right wavelength and controlling the laser energy is the key to achieving safe and efficient cleaning.

Another type of cleaning method is suitable for cleaning the laser energy absorption coefficient of the substrate and the surface attachments, or the substrate is more sensitive to the acid vapor formed by the heating of the coating, or the coating will generate toxic substances after the heating. This type of method usually uses high-power and high-repetition rate pulsed lasers to impact the cleaned surface to convert part of the beam into sound waves. After the sound wave hits the hard surface of the lower layer, the returned part interferes with the incident sound wave generated by the laser, generating high-energy waves, causing the coating to explode in a small area. The coating is compressed into powder and then removed by the vacuum pump. It won't hurt.