Xianglei Song, Shu Li, Mengtao Gu, Biao Zhang, Chuanlong Xu. Three-Dimensional Reconstruction of Micro-Scale Flow Field Based on Light Field Microscopic Imaging[J]. Acta Optica Sinica, 2019, 39(10): 1011002
- Acta Optica Sinica
- Vol. 39, Issue 10, 1011002 (2019)
Fig. 1. Schematic of the light field microscopic imaging (f o, f t and f μ are the focal length of the objective lens, the tube lens and the microlens, respectively)
Fig. 2. Schematic of the light field Micro-PIV system (L l is the flange distance of C lens mount)
Fig. 3. Schematic of the light field microscopic imaging and the deconvolution reconstruction for micro-scale flow
Fig. 4. Imaging process of a point light source in light field microscopic imaging system
Fig. 5. PSFs of the light field microscopic imaging system obtained by calculation at different depths
Fig. 6. Photography of the experimental system
Fig. 7. Assembled cage light field camera system. (a) Schematic; (b) photography
Fig. 8. PSFs of the light field microscopic imaging system obtained by experiments at different depths
Fig. 9. V SSIM evaluation of PSFs calculated based on wave optics theory and obtained by experiment
Fig. 10. Reconstructed particle at z =40 μm. (a) Reconstructed tracer particle light intensity distribution; (b) front view; (c) side view
Fig. 11. Variation of the length of elongation with the defocusing distance (Rx and Rz are the results of theoretical calculation, and Rx e and Rz e are the results of experiments)
Fig. 12. Variation of the reconstructed position error with the defocusing distance
Fig. 13. Light field image of the tracer particles and reconstruction by simulation at particle concentration of 2.75×107 cm-3. (a) Light field image of tracer particles; (b) reconstructed tracer particles
Fig. 14. Reconstructed position errors of tracer particles at x and y directions
Fig. 15. Reconstructed position errors of tracer particles at z direction
Fig. 16. Light field images and reconstructed tracer particles by experiments. (a)(c) Light field images obtained at particle concentration of 2.75×106 cm-3 and 2.75×107 cm-3, respectively; (b)(d) reconstructed tracer particles at particle concentration of 2.75×106 cm-3 and 2.75×107 cm-3, respectively
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Table 1. Specific parameters of the light field microscopic imaging system
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