Chenxuan Yin, Yunfeng Ma, Wang Cheng, Guangyan Guo, Xuebo Yang, Fang Bai, Can Cao, Jiawei Zhou, Lü Weizhi, Yongjian Zhu, Lifen Liao, Zhongwei Fan. 3D Surface Reconstruction of Laser Damage of Optical Element Based on Wavelet Transform[J]. Laser & Optoelectronics Progress, 2023, 60(8): 0811032
- Laser & Optoelectronics Progress
- Vol. 60, Issue 8, 0811032 (2023)
Fig. 1. Experimental setup for micro imaging on-line detection
Fig. 2. Picture of an image acquisition part
Fig. 3. Principle of three level decomposition
Fig. 4. Flow chart of the proposed reconstruction algorithm
Fig. 5. Image sequence. (a) The 1st image; (b) the 10th image; (c) the 20th image; (d) the 31st image; (e) the 40th image
Fig. 6. Curves of focus evaluation functions
Fig. 7. Damage morphology of the sample. (a) Focus on the top; (b) focus on the bottom
Fig. 8. Top view of 3D point cloud map. (a) Brenner; (b) Tenengrad; (c) Eav; (d) Variance; (e) Energy; (f) Wave1; (g) Wave2; (h) Wave3; (i) Wave3D
Fig. 9. Comparison of reconstruction results. (a) Brenner; (b) Tenengrad; (c) Eav; (d) Variance; (e) Energy; (f) Wave1; (g) Wave2; (h) Wave3; (i) Wave3D
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Table 1. Performance index of the focus evaluation function
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Table 2. Calculation results of maximum depth
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