Ping SUN, Chao FAN, Qing DAI, Yu-xin TANG, Zhi-fang LEI, Chun-hua HU. A L-K Local Optical-flow-based Coordinate Profilometry by Using the Capture Line in Space[J]. Acta Photonica Sinica, 2020, 49(9): 0912003
- Acta Photonica Sinica
- Vol. 49, Issue 9, 0912003 (2020)
Fig. 1. A typical optical setup for 3-D surface measurement using fringe-projection
Fig. 2. The measured height distribution of the spherical crown
Fig. 3. The fringe pattern in experiment captured
Fig. 4. The calculated height distribution of the spherical crown
Fig. 5. The comparison of the cross section data between the calculated and its true value at y =0 mm in x direction
Fig. 6. The comparison of the absolute error distribution of the measured crown height when the projector coordinates xP and zP are set as -25 mm and 0 mm respectively, the imaging distance z 0 is 1 805 mm with that of 1 800 mm
Fig. 7. The comparison of the absolute error distribution of the measured crown height when z 0 and zP are set as -1 800 mm and 0 mm respectively, xP is -30 mm with that of -25 mm
Fig. 8. The comparison of the absolute error distribution of the measured crown height when z 0 and xP are set as 1 800 mm and -25 mm respectively, zP is 5 mm with that of 0mm
Fig. 9. The fringe patterns in experiment captured
Fig. 10. The calculated height distribution of the mask surface
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