Fig. 1. (a) Absorption model on the front side of particles; (b) Absorption model on the reverse side of particles; (c) Absorption force model; (d) Absorption deformation model^[16]

Fig. 2. (a) Relationship between particle size and contact radius; (b) Relationship between particle radius and adsorption force; (c) Relationship between laser energy density and average temperature rise; (d) Relationship between laser energy density and thermal stress

Fig. 3. Schematic diagram of the laser cleaning device

Fig. 4. Laser cleaning effect diagram of forward irradiation(a) and back irradiation(b)

Fig. 5. Image processing. (a) Original image; (b) Processing image

Fig. 6. (a) Diagram of cleaning rate changing with scanning speed; (b) Diagram of cleaning rate changing with power; (c) Curved surface diagram of three-factor response