Single reflector design for integrated low/high beam meeting multiple regulations with light field management

Ching Cherng Sun, Chi Shou Wu, Cheng Yan Hsieh, Yu Hsiang Lee, Shih Kang Lin, Tsung Xian Lee, Tsung Hsun Yang, Yeh Wei Yu

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This paper proposed an effective multi-objective design procedure, called light field management, for a single multi-segment reflector that can simultaneously project low beams and high beams for bicycle and e-bike applications. Furthermore, two different regulations can be met, including the K-mark and the ECE Class B regulations. Through light field management, the etendue and flux density of each segment can be effectively managed, so that the design successfully meets the multiple regulations. In the experimental verification, two mockup samples including a plastic reflector with aluminum coating and an aluminum reflector were fabricated to verify the validity of the design. The experiment showed that the contrast across the cutoff line reached 100 and above, where the brightest point for low beams reached 200 lux and the whole pattern reached 250 lux. The supreme behavior of the head lamp shows that the proposed design procedure is valuable and helpful to an optical designer.

Original languageEnglish
Pages (from-to)18865-18875
Number of pages11
JournalOptics Express
Volume29
Issue number12
DOIs
StatePublished - 7 Jun 2021

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