Design of an energy-efficient marine signal light based on white LEDs

Yung Chang Jen, Xuan Hao Lee, Shih Kang Lin, Ching Cherng Sun, Chih Shou Wu, Yeh Wei Yu, Tsung Hsun Yang

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


In this paper, we proposed and demonstrated a new design of marine signal light based on a phosphor-converted white light emitting diode. The light pattern was shaped in the vertical and horizontal directions, respectively, by a collimating total internal reflection lens with cylindrical lens array and a slanted shoulder to fit the requirement in the regulation. The vertical intensity distribution was collimated to 9° through an appropriate volume of the total internal reflection lens to fit the etendue of the light source. The horizontal intensity distribution was shaped with a cylindrical lens array to enlarge the horizontal to the divergent angle, and a specially-designed slanted shoulder to reduce the total internal reflection loss and extend the divergent angle from 45° to 67° with a flat-top shaping light pattern. As a result, only five pieces of the light emitting diode module around 6W is enough to build up a marine signal light to reach a distance of 8 nautical miles.

Original languageEnglish
Pages (from-to)2460-2469
Number of pages10
JournalOSA Continuum
Issue number8
StatePublished - 15 Aug 2019


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