Haichao Tang, Dahai Li, Lei Li, Pengyu Chen, Ruiyang Wang, Qionghua Wang. Planar Object Surface Shape Speckle Pattern Deflectometry Based on Digital Image Correlation[J]. Acta Optica Sinica, 2019, 39(2): 0212006
- Acta Optica Sinica
- Vol. 39, Issue 2, 0212006 (2019)
Fig. 1. Schematic of subset before and after deformation. (a) Reference image; (b) deformed image
Fig. 2. Optical path diagram of deflectometry
Fig. 3. Schematic of SPD test setup
Fig. 4. Schematic of image deformation. (a) Image reflected by reference surface; (b) image reflected by surface to be tested; (c) displacement of inspection point
Fig. 5. Reflection of light on reference surface
Fig. 6. Experimental setup
Fig. 7. Curves of mean intensity gradient versus number of speckle
Fig. 8. Pictures taken in experiment (inner circle area is used for surface measurement). (a) Captured using planar crystal; (b) speckles captured using acrylic plastic plate; (c) fringe captured in PMD
Fig. 9. Displacement of pixel points in effective area. (a) Displacement in x direction; (b) displacement in y direction
Fig. 10. Slope measurement results. (a)(b) Slope memeasured by SPD in x and y directions, respectively; (c)(d) slope measured by PMD in x and y directions, respectively
Fig. 11. Surface shape reconstruction results. (a) Result of SPD; (b) result of PMD; (c) surface difference between the two methods
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20