Laser cleaning is an effective method to remove dirt particles and films of different materials and sizes on solid surfaces. Laser cleaning is to form a laser beam with a specific spot shape and energy distribution after optical focusing and spot shaping of a continuous or pulsed laser with high brightness and good directionality. After the contaminant material absorbs the laser energy, it will produce a series of complex physical and chemical processes such as vibration, melting, burning, and even gasification, and finally make the contaminant detach from the surface of the material. Even if the laser acts on the cleaned surface, most All are reflected off, and will not cause damage to the substrate, so as to achieve the effect of cleaning. 
