Fig. 1. Principle of structured light measurement

Fig. 2. Simulation of slow varying surface

Fig. 3. Simulation of fast varying surface

Fig. 4. 3D structure reconstruction under random noise

Fig. 5. Relationship between reconstruction error and random noise standard deviation

Fig. 6. Relationship between height root mean square error and fringe frequency

Fig. 7. Schematic diagram of experimental device of dynamic liquid film measurement

Fig. 8. Height distribution of section of 5 mm gauge block

Fig. 9. Dynamic liquid film measurement

Fig. 10. 3D structure reconstruction of liquid film

Fig. 11. Liquid film morphology at different times

Fig. 12. Morphology distribution of section of liquid film at different times