Optical design of Fresnel lens type for  ADB system

Optical design of Fresnel lens type for ADB system Shisheng Fan1, Zhiwei Shi1*, Quangui He1, Shu Huang1 1School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, P.R.China*Contact email address: Zhiwei Shi (szwstar@gdut.edu.cn)Abstract—ADB, being short for adaptive driving beam, has been one of the hot spots in the field of vehicle front lighting research. Its advantage lies in the fact that problem of glare caused by high beams can be solved effectively, to improve the safety of driving. However, most of the existing design methods of ADB result in complex structure and produce high cost, which restricts their widespread application. Based on matrix mode, this paper investigates the design method of Fresnel lens type for ADB, where the light transmit by several surfaces to obtain the result of optical partitions, and meanwhile, avoid the mutual interference between different LEDs. The design guarantees simple structure and low cost. The simulation results generated by Lucidshape are given to demonstrate the effectiveness and attractiveness of the proposed design method, which not only satisfies the demand of fundamental high beams, but also achieves the function of ADB perfectly. Keywords-LED high beams; Fresnel lens type; optical partitions