Zhanyu Liu, Peipei Wang, Zhiliang Jin, Haiyang Wang, Daxi Xiong. Free-Form Lens Design for LED Fishing Lamp with Stable Illumination[J]. Acta Optica Sinica, 2021, 41(5): 0522003
- Acta Optica Sinica
- Vol. 41, Issue 5, 0522003 (2021)
Fig. 1. Illumination range of LED fishing lamps
Fig. 2. Relationship between the divergent angle of 110° and the effective irradiation angle of 90° of LED fishing lamp under different rolling angles. (a) Boat tilting to the left; (b) boat not rolling; (c) boat tilting to the right
Fig. 3. Divergence angle of LED fishing lamp. (a) Fan-shaped divergence angle is 110° on the Y-Z cross-section; (b) small divergence angle on the X-Y cross-section
Fig. 4. Package of LED chips. (a) 3D model of LED module; (b) distribution of LED chips
Fig. 5. Schematic of the cross-section of optical system and light path
Fig. 6. Ray tracing on the first surface and second surface of Y-Z cross-section
Fig. 7. Ray tracing on the first surface and second surface of X-Y cross-section
Fig. 8. Structure of the free-form lens. (a) 3D model of the lens; (b) Y-Z cross-section of the lens; (c) fabricated free-form lens sample
Fig. 9. Light intensity distribution of LED fishing lamps in Y-Z plane and X-Y plane
Fig. 10. Illuminance distribution on the target surface under different illumination angles. (a) 0°; (b) -10°; (c) -5°; (d) 5°; (e) 10°
Fig. 11. Experiment measurement. (a) Field illumination effect; (b) location of the test points
Fig. 12. Simulated and experimental relative illumination distributions on the target plane along Y-axis direction at different illumination angles. (a) 0°; (b) -10°; (c) -5°; (d) 5°; (e) 10°
Fig. 13. Pictures of fishing lamp. (a) Improved LED fishing lamp; (b) ordinary LED fishing lamp[10]; (c) metal halide lamp
Fig. 14. Flux distribution curves of fishing lamp. (a) Improved LED fishing lamp; (b) ordinary LED fishing lamp[10]; (c) metal halide lamp
Fig. 15. Relative illuminance distribution of fishing lamp. (a) Improved LED fishing lamp; (b) ordinary LED fishing lamp[10]; (c) metal halide lamp
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Table 1. NCC and RMSE of simulation results and experimental results
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Table 2. Illumination stability of three fishing lamps
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