Ying Cheng, Zechao Wang, Xiaobing Xie, Yongbin Lu, Wenshuang Chang. Design and fabrication of a Fresnel lens for laser lamps[J]. Infrared and Laser Engineering, 2020, 49(3): 0314003
- Infrared and Laser Engineering
- Vol. 49, Issue 3, 0314003 (2020)
Fig. 1. Laser source structure and test platform
Fig. 2. Optical power of laser-driven white source under different power supplies
Fig. 3. Spot detection before and after phosphor
Fig. 4. Spot image incident on the phosphor of different convergent lenses
Fig. 5. Schematic diagram of laser light structure
Fig. 6. Design principle of Fresnel lens
Fig. 7. Whole calculation flow chart
Fig. 8. Calculation flow chart of discrete point of Fresnel lens
Fig. 9. Calculation and modeling of discrete points of Fresnel lens
Fig. 10. Ray tracing results of point source
Fig. 11. Illumination distribution on receiving surface. (a) distance 40 mm from the light source, (b) distance 25 m from the light source
Fig. 12. Ultra-precision machining of Fresnel lens
Fig. 13. Laser Fresnel lamp module
Fig. 14. Lighting experiment of laser lamp
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