Fig. 1. Optical rotation drilling system based on the Dove prism

Fig. 2. Effect of defocusing amount, laser average power and spot overlap rate on aperture. (a) Change curve of the light intensity with defocusing amount; (b) change curve of the light intensity with average power; (c) overlap rate of the optical rotation drilling spot; (d) relationship between pulse frequency and spot overlap rate under different rotation diameters

Fig. 3. Schematic diagram of the adjusting aperture and taper. (a) Schematic diagram of the solving aperture and taper; (b) schematic diagram of the aperture and taper

Fig. 4. Relationship between the angle of the wedge prism and the angle of emergence. (a) θ≤ α+β; (b) θ>α+β

Fig. 5. Relationship between the rotation diameter of the spot and the angle of the wedge prism on the focal plane

Fig. 6. Relationship between the spot rotation diameter and the diameter of the entrance and exit of the hole. (a) Change curves of the spot rotation diameter, the diameter of the entrance and exit of the hole, and the position of the translational mirror; (b) exit angle of the focused beam; (c) taper of the micro-hole

Fig. 7. Relationship between taper and the rotation diameter of the laser spot

Fig. 8. Morphology of the cross section, entrance and exit of the micropore. (a)--(b) Micropore cross section; (c)--(d) micropore entrance; (e) micropore exit