Fig. 1. Measuring principle of LSLS

Fig. 2. Calibration model of πT and πL not coinciding

Fig. 3. Measuring devices of LSLS

Fig. 4. Image of reference target

Fig. 5. Calculation process of camera coordinates of laser line. (a) Ceramic target; (b) laser line on target

Fig. 6. Projection of reference points on πL

Fig. 7. Fitting surfaces of corresponding points. (a) Pixel coordinates and X coordinates; (b) pixel coordinates and Y coordinates

Fig. 8. Calculation process of intersection points

Fig. 9. Distribution of test points on laser plane under different target positions

Fig. 10. Measurement errors under different degrees of fitting polynomial

Fig. 11. Measurement errors of different calibration methods