Liangzhi Liu, Liang Guo, Zhitao Chen, Zhiqing Zhang, Qingmao Zhang, Yiqin Xu. Design of Collimating Lens with Freeform Surfaces Based on Negative Focal Length Transmission Structure[J]. Laser & Optoelectronics Progress, 2022, 59(17): 1722005
- Laser & Optoelectronics Progress
- Vol. 59, Issue 17, 1722005 (2022)
Fig. 1. Composition diagram of collimating lens
Fig. 2. Arithmetic design principle of negative focal distance transmission structure
Fig. 3. Arithmetic design principle of virtual light source
Fig. 4. Arithmetic design principle of reflection structure
Fig. 5. Angles of incidence on
Fig. 6. Collimating lens. (a) Discrete point matched curve; (b) 3D solid model
Fig. 7. Numerical relationship between refraction angle and incidence angle
Fig. 8. Volumes of different range of reflection collimating angles
Fig. 9. Ray tracing results of collimating module
Fig. 10. Light spot before collimating module optimization
Fig. 11. Photomatric data before collimating module optimization
Fig. 12. Light spot after collimating module optimization
Fig. 13. Photomatric data after collimating module optimization
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