• Chinese Journal of Lasers
  • Vol. 47, Issue 11, 1104002 (2020)
Wang Weisong, Wang Xinyu, Li Panyuan, and Shi Yishi*
Author Affiliations
  • University of Chinese Academy of Sciences, Beijing 100049, China
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    DOI: 10.3788/CJL202047.1104002 Cite this Article Set citation alerts
    Wang Weisong, Wang Xinyu, Li Panyuan, Shi Yishi. A Dual-Lens Laser Surface Profile Measurement Method for Solving the Problem of Light Stripe Occlusion[J]. Chinese Journal of Lasers, 2020, 47(11): 1104002 Copy Citation Text show less
    Light stripe occlusion phenomenon. (a) Self-occlusion; (b) physical map; (c) CMOS acquisition map
    Fig. 1. Light stripe occlusion phenomenon. (a) Self-occlusion; (b) physical map; (c) CMOS acquisition map
    Intersection and loss of light stripe. (a) Physical map; (b) CMOS acquisition map
    Fig. 2. Intersection and loss of light stripe. (a) Physical map; (b) CMOS acquisition map
    Loss and intersection of light stripe. (a) Loss and intersection of light stripe caused by laser divergence angle; (b) loss and intersection of light stripe caused by depth of field
    Fig. 3. Loss and intersection of light stripe. (a) Loss and intersection of light stripe caused by laser divergence angle; (b) loss and intersection of light stripe caused by depth of field
    Dual-lens direct incidence laser triangulation
    Fig. 4. Dual-lens direct incidence laser triangulation
    Dual-lens laser triangulation method
    Fig. 5. Dual-lens laser triangulation method
    Structure of dual-lens system. (a) Model map; (b) physical map; (c) dual-lens direct incidence laser triangulation support structure
    Fig. 6. Structure of dual-lens system. (a) Model map; (b) physical map; (c) dual-lens direct incidence laser triangulation support structure
    Light stripe center extraction
    Fig. 7. Light stripe center extraction
    Data offset
    Fig. 8. Data offset
    Optimal offset and variance
    Fig. 9. Optimal offset and variance
    Three-dimensional recovery results under light stripe occlusion. (a) 12.5° to the left; (b) 12.5° to the right; (c) 12.5° light stripe occlusion on the left ; (d) 12.5° light stripe occlusion on the right
    Fig. 10. Three-dimensional recovery results under light stripe occlusion. (a) 12.5° to the left; (b) 12.5° to the right; (c) 12.5° light stripe occlusion on the left ; (d) 12.5° light stripe occlusion on the right
    Lens cover reconstruction. (a) Reconstruction before matching fusion; (b) reconstruction after matching fusion; (c) reconstruction after modifying data difference; (d) surface features
    Fig. 11. Lens cover reconstruction. (a) Reconstruction before matching fusion; (b) reconstruction after matching fusion; (c) reconstruction after modifying data difference; (d) surface features
    Cylinder data fusion diagrams. (a) Left lens data; (b) right lens data; (c) complete cylindrical topography
    Fig. 12. Cylinder data fusion diagrams. (a) Left lens data; (b) right lens data; (c) complete cylindrical topography
    Comparison of single and double lens recovery results. (a) Single lens recovery result; (b) dual-lens recovery result
    Fig. 13. Comparison of single and double lens recovery results. (a) Single lens recovery result; (b) dual-lens recovery result
    Comparison of two algorithms. (a) Progressive algorithm; (b) global algorithm
    Fig. 14. Comparison of two algorithms. (a) Progressive algorithm; (b) global algorithm
    Optimal offset and variance after fitting
    Fig. 15. Optimal offset and variance after fitting
    Relative error of optimal offset
    Fig. 16. Relative error of optimal offset
    Data sourceLens coverCylinderKey 1Key 2Coin
    Left lens10.392.522.021.5719.91
    Right lens8.074.171.420.991.62
    Data fusion0.340.430.10.110.45
    Table 1. Percentage of missing data in the full data%
    ObjectiveProgressivealgorithm offsetGlobal variancealgorithm offset
    Cylinder85
    Key 11313
    Key 2-69-69
    Lens cover10897
    Coin-47-48
    Table 2. Comparison of data offsets between progressive algorithm and global algorithmpixel
    Surface typeFirst-ordercoefficientConstant term
    Lens cover-0.00035530.1045
    Cylinder-0.00330.5666
    Key 10.0011-0.3607
    Key 20.00009605-0.0309
    Coin-0.00034870.0563
    Table 3. Fitting coefficient of offset
    Wang Weisong, Wang Xinyu, Li Panyuan, Shi Yishi. A Dual-Lens Laser Surface Profile Measurement Method for Solving the Problem of Light Stripe Occlusion[J]. Chinese Journal of Lasers, 2020, 47(11): 1104002
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