Fig. 1. Schematic of phase measuring deflectometry (PMD) system

Fig. 2. Fringe quality analysis model in PMD system

Fig. 3. Simulation result for the influence of dynamic range of fringe intensity on phase accuracy

Fig. 4. Measured response curve of system

Fig. 5. Simulation results of direct relations between nonlinearity and RFFA/RFDA. (a) RFFA/RFDA=12.24 ; (b) RFFA/RFDA=4.23

Fig. 6. Simulation result for the effect of nonlinearity on phase error

Fig. 7. Relationships between system parameters and contrast ratio of fringe pattern obtained by simulation. (a) Relationships between F value or fringe pattern period and contrast ratio of fringe pattern when b is 0.40; (b) relationships between fringe pattern period or modulation and contrast ratio of fringe patter when F value is fixed at certain value

Fig. 8. Relationships between system parameters and sinuousness of fringe pattern obtained by simulation. (a) Relationships between F value or fringe pattern period and sinuousness of fringe pattern when b is 0.40; (b) relationships between fringe pattern period or modulation and sinuousness of fringe pattern when F value is 11.0

Fig. 9. Picture of experimental system

Fig. 10. Fringe patterns captured by CCD camera in PMD system under different conditions. (a) b=0.40, F=5.6, T=20 pixel; (b) b=0.40, F=8.0, T=20 pixel; (c) b=0.40, F=8.0, T=80 pixel; (d) b=0.05, F=5.6, T=30 pixel; (e) b=0.45, F=5.6, T=30 pixel; (f) b=0.45, F=5.6, T=80 pixel

Fig. 11. Relationships between system parameters and contrast ratio of fringe pattern in PMD system. (a) Relationships between F value or fringe pattern period and contrast ratio of fringe pattern when b is 0.40; (b) relationships between fringe pattern period or modulation and contrast ratio of fringe pattern when F value is 5.6

Fig. 12. Relationships between system parameters and sinuousness of fringe pattern in PMD system. (a) Relationships between F value or fringe pattern period and sinuousness of fringe pattern when b is 0.40; (b) relationships between fringe pattern period or modulation and sinuousness of fringe pattern when F value is 5.6