Jiawen WANG, Junqing WU, Minyang WU, Yingbiao AN, Jingjing LIU, Bin YAN, Fujun YANG. Whole-field deformation measurement of clear orthodontic aligner using electronic speckle pattern interferometry[J]. Optics and Precision Engineering, 2024, 32(17): 2663
- Optics and Precision Engineering
- Vol. 32, Issue 17, 2663 (2024)
Fig. 1. Optical arrangement for speckle interference deformation measurement
Fig. 2. Illustration of phase-shifter for tri-color
Fig. 3. Schematic of phase shift generating for tri-color beams
Fig. 4. Specimen production
Fig. 5. Experimental setup
Fig. 6. Wrapped phase maps of u and v components
Fig. 7. Phase distribution of same cross-section on phase maps and linear fitting results of unwrapped phase
Fig. 8. Experimental setup for measuring 3D deformation of clear aligner
Fig. 9. Color speckle pattern and its RGB components
Fig. 10. Speckle fringe patterns of deformation components at initial stage
Fig. 11. Wrapped phase related to speckle fringe patterns shown in Fig. 10
Fig. 12. Evolution of relative deformation every other 3 s of tested aligner in following 60 s
Fig. 13. Phase maps related to 3D deformation components at 60 s after loaded u ， v and w obtained by ESPI
Fig. 14. Denoised phase fringe patterns shown in Fig. 13 by window-deformable adaptive filter
Fig. 15. Isoline distribution of derivatives obtained by digital differential operation on those unwrapped phase maps
Fig. 16. Three-dimensional distribution of clear aligner deflected deformation
Fig. 17. Enhanced nephogram of strain component εxx
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Table 1. Rotational angles measured by proposed ESPI configuration
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