Table 4.
Depth (ZW) measurement error after correction (unit: mm).
| XW | −80 | −60 | −40 | −20 | 0 | 20 | 40 | 60 | 80 | 100 | 120 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| ZW | |||||||||||
| 415 | 1.95 | −0.68 | 0.74 | 1.11 | |||||||
| 435 | 0.48 | 0.33 | 0.33 | 0.14 | 0.14 | ||||||
| 455 | 1.25 | −0.74 | 1.21 | 0.68 | 1.22 | 0.55 | |||||
| 475 | 0.39 | −0.3 | −0.51 | −0.13 | 0.02 | 0.31 | 0.62 | ||||
| 495 | 0.72 | 0.38 | 0.25 | 1.8 | 1.8 | 1.61 | 1.56 | 1.42 | |||
| 515 | 1.57 | 0.75 | 0.36 | −0.14 | 1.27 | 2.54 | 2.12 | 1.57 | |||
| 535 | 0.71 | 1.82 | 0.94 | −0.05 | 1.19 | 2.27 | 3.35 | 2.34 | 1.51 | ||
| 555 | 1.34 | −0.31 | 0.5 | 1.52 | 0.05 | 0.98 | 1.87 | 0.36 | 1.34 | −0.11 | |
| 575 | 2.26 | 0.48 | 1.16 | 1.68 | 2.43 | 0.53 | 1.17 | 1.77 | 2.46 | 0.62 | |
| 595 | −0.16 | 0.26 | 0.45 | 0.21 | −1.56 | 1.72 | 1.94 | −0.29 | 0.05 | 3.14 | 3.45 |
| 615 | −0.78 | −0.72 | −0.73 | 2.52 | −0.55 | −0.32 | −0.26 | 3.00 | 0.06 | 0.15 | 0.39 |
| 635 | 0.09 | −0.13 | −0.41 | 2.13 | −0.79 | −0.82 | −1.08 | 1.78 | 1.44 | 1.83 | 1.78 |
| Avg. Error | −0.28 | 0.60 | 0.31 | 1.11 | 0.27 | 0.42 | 0.67 | 1.37 | 1.06 | 1.65 | 1.27 |