title: Design of an LED-based compound optical system for a driving beam system.
abstract: This paper proposes an LED-based compound optical system, which can be involved in the design of the driving beam system in automotive headlamps with high system efficiency and low power consumption. The compound system can meet the requirements announced in the UNECE regulation "Addendum 111: Regulation No. 112 Revision 2." Also, it is composed of a nonspherical reflector, a compound lens, and a two-dimensional diverging lens. Using a single device of high-brightness LED of merely 7.6 W, the specified illumination requirements for the driving beam can be achieved. As we have expected, on the test screen at a distance of 25 m, the simulation results, as well as the testing results for the prototype, can reach the illuminance distribution requirements, including all specified regions and key points. Moreover, this compound system enjoys the features of high compactness, high energy efficiency, and feasibility of manufacturing.
authors.affiliation: Department of Light Sources & Illuminating Engineering, School of Information Science and Engineering, Fudan University, Shanghai, China. amge@fudan.edu.cn
authors.forename: Aiming
authors.initials: A
authors.lastname: Ge
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Zhengqing
authors.initials: Z
authors.lastname: Du
authors.forename: Peng
authors.initials: P
authors.lastname: Qiu
authors.forename: Junwei
authors.initials: J
authors.lastname: Wang
authors.forename: Jinlin
authors.initials: J
authors.lastname: Cai
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Song