Fig. 1. Coordinate measurement principle for laser tracker

Fig. 2. Transit offset error model

Fig. 3. Model of transit tilt error

Fig. 4. Laser transit and tilt error model

Fig. 5. Eccentricity error model for test rod mounting

Fig. 6. Position of telecentric measurement system

Fig. 7. Images of central axis of test rods

Fig. 8. Trajectory of central axis of test rods

Fig. 9. Images of central axis of test rods

Fig. 10. Transit offset error calibration model

Fig. 11. Images of central axis of test rods

Fig. 12. Transit tilt error calibration model

Fig. 13. Laser offset and tilt error calibration

Fig. 14. Laset offset and tilt error calibration model

Fig. 15. Experimental setup of transit offset error

Fig. 16. Central axis offset of test rods

Fig. 17. Measurement data and curve fitting of telecentric measurement system

Fig. 18. Experimental setup of laser offset and tilt error calibration

Fig. 19. PSD calibration

Fig. 20. Length measurement test

Fig. 21. Scale bar test positions

Fig. 22. Measurement errors before and after compensation of geometric error