Haoran Li, Shuai Zhang, Bofu Xie, Ya Wen, Shaowei Xu, Yuliang Tao, Xing Zhao, Weiwei Liu. Design of Aspheric Surface Annular Fresnel Lens for Filament Lidar Collection System[J]. Chinese Journal of Lasers, 2023, 50(7): 0708010
- Chinese Journal of Lasers
- Vol. 50, Issue 7, 0708010 (2023)
Fig. 1. Diagram of Fresnel lens array
Fig. 2. Schematic of Fresnel lens
Fig. 3. Design flow diagram of Fresnel lens
Fig. 4. Ray tracing diagram of Fresnel lens after optimization of 15th annulus shape
Fig. 5. Spot sequence diagram of 15th annulus of Fresnel lens
Fig. 6. Designed lens annulus spot diameters
Fig. 7. Simulation analysis of beam convergence performance of Fresnel lens
Fig. 8. Simulation diagrams of Fresnel lens receivers. (a) Receiver A; (b) receiver B
Fig. 9. Convergent spot diameters of different annuluses under influence of tolerance
Fig. 10. Fresnel lens processing physical picture
Fig. 11. Schematic of detection optical path of energy transmittance
Fig. 12. Spot diameter measurement
Fig. 13. Experimental diagram of energy coupling efficiency
Fig. 14. Focusing spot at 670 mm from Fresnel lens
Fig. 15. Spectral signal intensities at different positions
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Table 1. Design indexes of Fresnel lens
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Table 2. Optimization design results of Fresnel lens annuluses
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