Fig. 1. Non-ideal telecentric optical path analysis

Fig. 2. Flow chart of precision three-dimensional measurement based on telecentric imaging

Fig. 3. Working diagram of monocular telecentric structured light system

Fig. 4. Phase-height model based on telecentric imaging

Fig. 5. Telecentric camera imaging model

Fig. 6. Experimental system equipment

Fig. 7. Determine the 'central plane' according to the image clarity

Fig. 8. Phase error correction

Fig. 9. Fitting of compensation coefficients k₁ and k₂ with the distance from the center plane

Fig. 10. Definition of each measurement line segment

Fig. 11. Schematic diagram of the calibration plate placement in the three-dimensional reconstruction process

Fig. 12. Measured values before and after the correction of the sytem parameters of each line segment

Fig. 13. Three-dimensional reconstruction of high-precision standard ball schematic diagram of different parts

Fig. 14. Reconstruction of standard sphere point cloud and sphere fitting