Qizhen Hou, Hao Wang, Huiying Duan. Near-Field Detection Method for Light Intensity Based on Fourier Series Fitting[J]. Laser & Optoelectronics Progress, 2023, 60(17): 1712005
- Laser & Optoelectronics Progress
- Vol. 60, Issue 17, 1712005 (2023)
Fig. 1. Process of light intensity detection
Fig. 2. Comparison of interpolation methods. (a) Real curve and random points; (b) Pchip; (c) Linear; (d) Spline; (e) Polynomial; (f) Fourier
Fig. 3. Improvement of Fourier series fitting algorithm. (a) Traditional fitting algorithm; (b) variance of each point; (c) curve form; (d) improved Fourier series fitting algorithm
Fig. 4. Images at different detection distances. (a) >r; (b) <r
Fig. 5. Typical configurations of navigation lights. (a) Rectangular array; (b) circular array; (c) line-shaped array; (d) wing-shaped array; (e) X-shaped array
Fig. 6. Result of image processing
Fig. 7. Light intensity distributions of single LED light source. (a) True light intensity distribution; (b) light intensity distribution of first fitting
Fig. 8. Comparison of calculation results. (a) True light intensity distribution; (b) light intensity distribution of primal algorithm; (c) light intensity distribution of improved algorithm
Fig. 9. Detection results of five arrays. (a) True light intensity distribution; (b) Wea; (c) Bri; (d) In10; (e) In30; (f) Des
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Table 1. Errors of different fitting methods
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Table 2. Matched-degrees calculated by two algorithms
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Table 3. Matched-degrees of five arrays
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Table 4. Matched-degrees of Des
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