Zhao Fang, Zhang Xiao, Zhao Jianjun, Yang Libin. 3D Ship Deformations Measurement Method Based on Free-Space Optical Communication[J]. Chinese Journal of Lasers, 2018, 45(4): 404003
- Chinese Journal of Lasers
- Vol. 45, Issue 4, 404003 (2018)
Fig. 1. Composition of 3D ship deformation measurement system based on FSO
Fig. 2. Simulation of cross creation process. (a) Original cross image; (b) Gaussian filter; (c) cross image on the detector; (d) cross image after adding 3D deformation angles
Fig. 3. Schematic of influence of the roll angle of ship on the image coordinate system
Fig. 4. Schematic of driving circuit
Fig. 5. Error standard deviation of 3D deformation angles under different atmospheric turbulence intensities
Fig. 6. Calculation result of Rytov variance based on Cn2 monthly average value. (a) Statistical results of Cn2 from January to December; (b) Rytov variance
Fig. 7. Atmospheric absorption of infrared wave band in mid-latitude (a) summer and (b) winter
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Table 1. Statistics of Cn2 in different seasons in the coastal area
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Table 2. Atmospheric visibility and transmittance under different weather conditions
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